Fix commenting ranges and opening comments (microsoft#209866)

Author: alexr00

src/vs/workbench/contrib/comments/browser/commentReply.ts

@@ -177,7 +177,7 @@ export class CommentReply<T extends IRange | ICellRange> extends Disposable {
 	public focusIfNeeded() {
 		if (!this._commentThread.comments || !this._commentThread.comments.length) {
 			this.commentEditor.focus();
-		} else if (this.commentEditor.getModel()!.getValueLength() > 0) {
+		} else if ((this.commentEditor.getModel()?.getValueLength() ?? 0) > 0) {
 			this.expandReplyArea();
 		}
 	}
@@ -195,10 +195,6 @@ export class CommentReply<T extends IRange | ICellRange> extends Disposable {
 		return this.commentEditor.hasWidgetFocus();
 	}
 
-	public getCommentModel() {
-		return this.commentEditor.getModel()!;
-	}
-
 	public updateCanReply() {
 		if (!this._commentThread.canReply) {
 			this.form.style.display = 'none';