Revert "Exand custom views by default"

This reverts commit f82c0f12.

src/vs/workbench/api/browser/viewsExtensionPoint.ts

@@ -382,7 +382,7 @@ class ViewsExtensionHandler implements IWorkbenchContribution {
 						ctor: CustomTreeViewPanel,
 						when: ContextKeyExpr.deserialize(item.when),
 						canToggleVisibility: true,
-						collapsed: false,
+						collapsed: this.showCollapsed(container),
 						treeView: this.instantiationService.createInstance(CustomTreeView, item.id, container),
 						order: ExtensionIdentifier.equals(extension.description.identifier, container.extensionId) ? index + 1 : undefined,
 						extensionId: extension.description.identifier,
@@ -443,6 +443,16 @@ class ViewsExtensionHandler implements IWorkbenchContribution {
 			default: return this.viewContainersRegistry.get(`workbench.view.extension.${value}`);
 		}
 	}
+
+	private showCollapsed(container: ViewContainer): boolean {
+		switch (container.id) {
+			case EXPLORER:
+			case SCM:
+			case DEBUG:
+				return true;
+		}
+		return false;
+	}
 }
 
 const workbenchRegistry = Registry.as<IWorkbenchContributionsRegistry>(WorkbenchExtensions.Workbench);