Fix: source editor is not closed when style is removed

edit/edit.js

@@ -2072,8 +2072,9 @@ function onRuntimeMessage(request) {
       }
       break;
     case 'styleDeleted':
-      if (styleId && styleId === request.id) {
+      if (styleId && styleId === request.id || editor && editor.getStyle().id === request.id) {
         window.onbeforeunload = () => {};
+        // FIXME: Scripts may not close windows that were not opened by script.
         window.close();
         break;
       }

edit/source-editor.js

@@ -458,5 +458,12 @@ function createSourceEditor(style) {
       });
   }
 
-  return {replaceStyle, save, toggleStyle, updateStyleMeta, isDirty: dirty.isDirty};
+  return {
+    replaceStyle,
+    save,
+    toggleStyle,
+    updateStyleMeta,
+    isDirty: dirty.isDirty,
+    getStyle: () => style
+  };
 }