Collapse some equivalent rules to reference files only once

src/vs/base/browser/ui/findinput/findInput.css

@@ -75,27 +75,17 @@
 	background: #555;
 }
 
+.hc-black .monaco-findInput > .controls > .custom-checkbox.case-sensitive,
 .vs-dark .monaco-findInput > .controls > .custom-checkbox.case-sensitive {
 	background: url('case-sensitive-dark.svg') center center no-repeat;
 }
 
+.hc-black .monaco-findInput > .controls > .custom-checkbox.whole-word,
 .vs-dark .monaco-findInput > .controls > .custom-checkbox.whole-word {
 	background: url('whole-word-dark.svg') center center no-repeat;
 }
 
+.hc-black .monaco-findInput > .controls > .custom-checkbox.regex,
 .vs-dark .monaco-findInput > .controls > .custom-checkbox.regex {
 	background: url('regex-dark.svg') center center no-repeat;
 }
-
-/* High Contrast Theming */
-.hc-black .monaco-findInput > .controls > .custom-checkbox.case-sensitive:before {
-	content: url('case-sensitive-dark.svg');
-}
-
-.hc-black .monaco-findInput > .controls > .custom-checkbox.whole-word:before {
-	content: url('whole-word-dark.svg');
-}
-
-.hc-black .monaco-findInput > .controls > .custom-checkbox.regex:before {
-	content: url('regex-dark.svg');
-}
\ No newline at end of file

src/vs/base/parts/tree/browser/tree.css

@@ -227,10 +227,7 @@
 	background: url('CollapseAll.svg') center center no-repeat;
 }
 
+.hc-black .monaco-tree-action.collapse-all,
 .vs-dark .monaco-tree-action.collapse-all {
 	background: url('CollapseAll_inverse.svg') center center no-repeat;
 }
-
-.hc-black .monaco-tree-action.collapse-all:before {
-	content: url('CollapseAll_inverse.svg');
-}
\ No newline at end of file

src/vs/editor/contrib/find/browser/findWidget.css

@@ -279,14 +279,17 @@
 	box-shadow: 0 2px 8px #000;
 }
 
+.monaco-editor.hc-black .find-widget .previous,
 .monaco-editor.vs-dark .find-widget .previous {
 	background-image: url('images/previous-inverse.svg');
 }
 
+.monaco-editor.hc-black .find-widget .next,
 .monaco-editor.vs-dark .find-widget .next {
 	background-image: url('images/next-inverse.svg');
 }
 
+.monaco-editor.hc-black .find-widget .monaco-checkbox .label,
 .monaco-editor.vs-dark .find-widget .monaco-checkbox .label {
 	background-image: url('images/cancelSelectionFind-inverse.svg');
 }
@@ -299,26 +302,32 @@
 	background-color: rgba(150, 150, 150, 0.3);
 }
 
+.monaco-editor.hc-black .find-widget .close-fw,
 .monaco-editor.vs-dark .find-widget .close-fw {
 	background-image: url('images/close-dark.svg');
 }
 
+.monaco-editor.hc-black .find-widget .replace,
 .monaco-editor.vs-dark .find-widget .replace {
 	background-image: url('images/replace-inverse.svg');
 }
 
+.monaco-editor.hc-black .find-widget .replace-all,
 .monaco-editor.vs-dark .find-widget .replace-all {
 	background-image: url('images/replace-all-inverse.svg');
 }
 
+.monaco-editor.hc-black .find-widget .expand,
 .monaco-editor.vs-dark .find-widget .expand {
 	background-image: url('images/expando-expanded-dark.svg');
 }
 
+.monaco-editor.hc-black .find-widget .collapse,
 .monaco-editor.vs-dark .find-widget .collapse {
 	background-image: url('images/expando-collapsed-dark.svg');
 }
 
+.monaco-editor.hc-black .find-widget .button:not(.disabled):hover,
 .monaco-editor.vs-dark .find-widget .button:not(.disabled):hover {
 	background-color: #2f3334;
 }
@@ -343,64 +352,16 @@
 	box-shadow: none;
 }
 
-.monaco-editor.hc-black .find-widget .button:not(.disabled):hover {
-	background: none;
-}
-
-.monaco-editor.hc-black .find-widget .button {
-	background: none;
-}
-
 .monaco-editor.hc-black .find-widget .button:before {
 	position: relative;
 	top: 1px;
 	left: 2px;
 }
 
-.monaco-editor.hc-black .find-widget .previous:before {
-	content: url('images/previous-inverse.svg');
-}
-
-.monaco-editor.hc-black .find-widget .next:before {
-	content: url('images/next-inverse.svg');
-}
-
-.monaco-editor.hc-black .find-widget .replace:before {
-	content: url('images/replace-inverse.svg');
-}
-
-.monaco-editor.hc-black .find-widget .replace-all:before {
-	content: url('images/replace-all-inverse.svg');
-}
-
-.monaco-editor.hc-black .find-widget .monaco-checkbox .label {
-	content: url('images/cancelSelectionFind-inverse.svg');
-	top: 1px;
-	left: 2px;
-}
-
 .monaco-editor.hc-black .find-widget .monaco-checkbox .checkbox:checked + .label {
 	background-color: rgba(150, 150, 150, 0.3);
 }
 
-.monaco-editor.hc-black .find-widget .close-fw:before {
-	content: url('images/close-dark.svg');
-	top: 1px;
-	left: 0px;
-}
-
-.monaco-editor.hc-black .find-widget .expand:before {
-	content: url('images/expando-expanded-dark.svg');
-	top: 38%;
-	left: 40%
-}
-
-.monaco-editor.hc-black .find-widget .collapse:before {
-	content: url('images/expando-collapsed-dark.svg');
-	top: 30%;
-	left: 40%;
-}
-
 .monaco-editor.hc-black .findMatch {
 	background: none;
 	border: 1px dotted #f38518;

src/vs/editor/contrib/folding/browser/folding.css

@@ -20,23 +20,16 @@
 	background-image: url('arrow-collapse.svg');
 }
 
+.monaco-editor.hc-black .margin-view-overlays:hover .folding,
 .monaco-editor.vs-dark .margin-view-overlays:hover .folding {
 	background-image: url('arrow-expand-dark.svg');
 }
 
+.monaco-editor.hc-black .margin-view-overlays .folding.collapsed,
 .monaco-editor.vs-dark .margin-view-overlays .folding.collapsed {
 	background-image: url('arrow-collapse-dark.svg');
 }
 
-/* High-contrast theme */
-.monaco-editor.hc-black .margin-view-overlays:hover .folding {
-	background-image: url('arrow-expand-dark.svg');
-}
-
-.monaco-editor.hc-black .margin-view-overlays .folding.collapsed {
-	background-image: url('arrow-collapse-dark.svg');
-}
-
 .monaco-editor .inline-folded:after {
 	color: grey;
 	margin: 0.1em 0.2em 0 0.2em;

src/vs/editor/contrib/parameterHints/browser/parameterHints.css

@@ -114,10 +114,12 @@
 	color: #C07A7A;
 }
 
+.monaco-editor.hc-black .parameter-hints-widget .button.previous,
 .monaco-editor.vs-dark .parameter-hints-widget .button.previous {
 	background-image: url('arrow-up-dark.svg');
 }
 
+.monaco-editor.hc-black .parameter-hints-widget .button.next,
 .monaco-editor.vs-dark .parameter-hints-widget .button.next {
 	background-image: url('arrow-down-dark.svg');
 }
@@ -131,11 +133,3 @@
 .monaco-editor.hc-black .parameter-hints-widget .documentation {
 	color: #C07A7A;
 }
-
-.monaco-editor.hc-black .parameter-hints-widget .button.previous:before {
-	content: url('arrow-up-dark.svg');
-}
-
-.monaco-editor.hc-black .parameter-hints-widget .button.next:before {
-	content: url('arrow-down-dark.svg');
-}
\ No newline at end of file

src/vs/editor/contrib/zoneWidget/browser/peekViewWidget.css

@@ -58,6 +58,7 @@
 	background-color: #1E1E1E;
 }
 
+.monaco-editor.hc-black .peekview-widget .head .peekview-actions .action-label.icon.close-peekview-action,
 .monaco-editor.vs-dark .peekview-widget .head .peekview-actions .action-label.icon.close-peekview-action {
 	background: url('media/close-inverse.svg') center center no-repeat;
 }
@@ -85,17 +86,6 @@
 	opacity: 0.6;
 }
 
-.monaco-editor.hc-black .peekview-widget .head .peekview-actions .action-label.icon.close-peekview-action {
-	background: none;
-}
-
-.monaco-editor.hc-black .peekview-widget .head .peekview-actions .action-label.icon.close-peekview-action:before {
-	content: url('media/close-inverse.svg');
-	display: inline-block;
-	height: 16px;
-	width: 16px;
-}
-
 .monaco-editor.hc-black .peekview-widget > .body {
 	border-color: #6FC3DF;
 }
\ No newline at end of file