fix css

src/vs/workbench/browser/parts/sidebar/media/sidebarpart.css

@@ -20,7 +20,7 @@
 	border-left: 1px solid;
 }
 
-.monaco-workbench > .part > .sidebar.title > .title-label span {
+.monaco-workbench > .sidebar > .title > .title-label span {
 	text-transform: uppercase;
 }
 
@@ -66,15 +66,15 @@
 
 /* TODO@theme */
 
-.vs .monaco-workbench > .part > .sidebar.title > .title-label span {
+.vs .monaco-workbench > .sidebar > .title > .title-label span {
 	color: #6f6f6f;
 }
 
-.vs-dark .monaco-workbench > .part > .sidebar.title > .title-label span  {
+.vs-dark .monaco-workbench > .sidebar > .title > .title-label span  {
 	color: #bbbbbb;
 }
 
-.hc-black .monaco-workbench > .part > .sidebar.title > .title-label span  {
+.hc-black .monaco-workbench > .sidebar > .title > .title-label span  {
 	color: #fff;
 }