selectBox: remove .monaco-workbench scoping

src/vs/base/browser/ui/selectBox/selectBox.css

@@ -15,11 +15,11 @@
 
 /** Actions */
 
-.monaco-workbench .monaco-action-bar .action-item.select-container {
+.monaco-action-bar .action-item.select-container {
 	cursor: default;
 }
 
-.monaco-workbench .monaco-action-bar .action-item .monaco-select-box {
+.monaco-action-bar .action-item .monaco-select-box {
 	font-size: 11px;
 	cursor: pointer;
 	min-width: 110px;
@@ -27,6 +27,6 @@
 	padding: 2px 23px 2px 8px;
 }
 
-.monaco-workbench.mac .monaco-action-bar .action-item .monaco-select-box {
+.mac .monaco-action-bar .action-item .monaco-select-box {
 	border-radius: 5px;
 }