More title polish (#49340)

Author: chrmarti

src/vs/workbench/browser/parts/quickinput/quickInput.css

@@ -18,35 +18,28 @@
 
 .quick-input-left-action-bar {
 	display: flex;
-	margin-left: 6px;
+	margin-left: 4px;
 	flex: 1;
 }
 
 .quick-input-left-action-bar.monaco-action-bar .actions-container {
 	justify-content: flex-start;
 }
 
-.quick-input-left-action-bar .action-label.icon {
-	margin: 0 5px 0 0;
-}
-
 .quick-input-title {
 	padding: 3px 0px;
 	text-align: center;
 }
 
 .quick-input-right-action-bar {
 	display: flex;
-	margin-right: 6px;
+	margin-right: 4px;
 	flex: 1;
 }
 
-.quick-input-right-action-bar .action-label.icon {
-	margin: 0 0 0 5px;
-}
-
 .quick-input-titlebar .monaco-action-bar .action-label.icon {
-	width: 16px;
+	margin: 0;
+	width: 19px;
 	height: 100%;
 	background-position: center;
 	background-repeat: no-repeat;

src/vs/workbench/browser/parts/quickinput/quickInput.ts

@@ -40,6 +40,7 @@ import { ActionBar, ActionItem } from 'vs/base/browser/ui/actionbar/actionbar';
 import { Action } from 'vs/base/common/actions';
 import URI from 'vs/base/common/uri';
 import { IdGenerator } from 'vs/base/common/idGenerator';
+import { IKeybindingService } from 'vs/platform/keybinding/common/keybinding';
 
 const $ = dom.$;
 
@@ -710,6 +711,7 @@ export class QuickInputService extends Component implements IQuickInputService {
 		@IPartService private partService: IPartService,
 		@IQuickOpenService private quickOpenService: IQuickOpenService,
 		@IEditorGroupsService private editorGroupService: IEditorGroupsService,
+		@IKeybindingService private keybindingService: IKeybindingService,
 		@IContextKeyService contextKeyService: IContextKeyService,
 		@IThemeService themeService: IThemeService
 	) {
@@ -1037,6 +1039,9 @@ export class QuickInputService extends Component implements IQuickInputService {
 		this.ui.list.matchOnDetail = false;
 		this.ui.ignoreFocusOut = false;
 
+		const keybinding = this.keybindingService.lookupKeybinding(BackAction.ID);
+		backButton.tooltip = keybinding ? localize('quickInput.backWithKeybinding', "Back ({0})", keybinding.getLabel()) : localize('quickInput.back', "Back");
+
 		this.inQuickOpen('quickInput', true);
 
 		this.ui.container.style.display = '';