fix: prometheus does not have two editor modes, fixes #9025

public/app/features/dashboard/submenu/submenu.ts

@@ -29,10 +29,6 @@ export class SubmenuCtrl {
     var search = _.extend(this.$location.search(), {editview: editview});
     this.$location.search(search);
   }
-
-  exitBuildMode() {
-    this.dashboard.toggleEditMode();
-  }
 }
 
 export function submenuDirective() {

public/app/plugins/datasource/prometheus/partials/query.editor.html

-<query-editor-row query-ctrl="ctrl" can-collapse="true" has-text-edit-mode="true">
+<query-editor-row query-ctrl="ctrl" can-collapse="true" has-text-edit-mode="false">
 	<div class="gf-form-inline">
 		<div class="gf-form gf-form--grow">
 			<textarea rows="3" class="gf-form-input" ng-model="ctrl.target.expr" spellcheck="false" placeholder="query expression" data-min-length=0 data-items=100 give-focus="ctrl.target.refId == 'A'" ng-model-onblur ng-change="ctrl.refreshMetricData()"></textarea>