Fixes file/line history title on last editor close

src/views/nodes/fileHistoryTrackerNode.ts

@@ -39,6 +39,8 @@ export class FileHistoryTrackerNode extends SubscribeableViewNode
 	getChildren(): ViewNode[] | Promise<ViewNode[]> {
 		if (this._child == null) {
 			if (this._fileUri == null && this.uri === unknownGitUri) {
+				this.view.titleDescription = undefined;
+
 				return [
 					new MessageNode(
 						this.view,

src/views/nodes/lineHistoryTrackerNode.ts

@@ -42,6 +42,8 @@ export class LineHistoryTrackerNode extends SubscribeableViewNode
 	getChildren(): ViewNode[] | Promise<ViewNode[]> {
 		if (this._child == null) {
 			if (this.uri === unknownGitUri) {
+				this.view.titleDescription = undefined;
+
 				return [
 					new MessageNode(
 						this.view,