Hide panel icon rendering feature (microsoft#229817)

Don't make workbench.panel.showLabel visible

Author: benibenj

src/vs/workbench/browser/parts/panel/panelPart.ts

@@ -134,7 +134,7 @@ export class PanelPart extends AbstractPaneCompositePart {
 			pinnedViewContainersKey: 'workbench.panel.pinnedPanels',
 			placeholderViewContainersKey: 'workbench.panel.placeholderPanels',
 			viewContainersWorkspaceStateKey: 'workbench.panel.viewContainersWorkspaceState',
-			icon: !this.configurationService.getValue('workbench.panel.showLabel'),
+			icon: this.configurationService.getValue('workbench.panel.showLabel') === false,
 			orientation: ActionsOrientation.HORIZONTAL,
 			recomputeSizes: true,
 			activityHoverOptions: {

src/vs/workbench/browser/workbench.contribution.ts

@@ -517,6 +517,7 @@ const registry = Registry.as<IConfigurationRegistry>(ConfigurationExtensions.Con
 			'workbench.panel.showLabel': {
 				'type': 'boolean',
 				'default': true,
+				'included': false,
 				'description': localize('panelShowLabel', "Controls whether activity items in the panel title are shown as label or icon."),
 			},
 			'workbench.panel.defaultLocation': {