Fixes repo quickpick choices fail w/ no editors

src/commands/commands.ts

@@ -1,5 +1,5 @@
 'use strict';
-import { commands, Disposable, TextEditor, TextEditorEdit } from 'vscode';
+import { commands, Disposable, TextEditor, TextEditorEdit, window } from 'vscode';
 import { Commands } from '../constants';
 
 export abstract class Command extends Disposable {
@@ -31,4 +31,23 @@ export abstract class EditorCommand extends Disposable {
     }
 
     abstract execute(editor: TextEditor, edit: TextEditorEdit, ...args: any[]): any;
+}
+
+export abstract class ActiveEditorCommand extends Disposable {
+    private _disposable: Disposable;
+
+    constructor(command: Commands) {
+        super(() => this.dispose());
+        this._disposable = commands.registerCommand(command, this._execute, this);
+    }
+
+    dispose() {
+        this._disposable && this._disposable.dispose();
+    }
+
+    _execute(...args: any[]): any {
+        return this.execute(window.activeTextEditor, ...args);
+    }
+
+    abstract execute(editor: TextEditor, ...args: any[]): any;
 }