panel top HC aware

fixes #3657

src/vs/workbench/browser/parts/panel/media/panelPart.css

@@ -14,3 +14,8 @@
 .monaco-workbench > .part.panel {
 	z-index: initial;
 }
+
+/* High Contrast Theming */
+.monaco-workbench.hc-black > .part.panel > .title {
+	border-top-color: #6FC3DF;
+}

src/vs/workbench/parts/debug/browser/media/repl.css

@@ -130,6 +130,10 @@
 	box-sizing: border-box;
 }
 
+.monaco-workbench.hc-black .repl .repl-input-wrapper {
+	border-top-color: #6FC3DF;
+}
+
 .monaco-workbench .repl .repl-input-wrapper:before {
 	left: 8px;
 	position: absolute;