gr-change-view: Call reload event with clear patchset set when editing commit msg

When editing the commit msg, we cannot just reload the current url,
we need to clear the patchset as well.

Release-Notes: skip
Change-Id: I100f138ed5c005fbb52b18280ca94228097ebdf2
(cherry picked from commit 3734138ff0658fd3e10325ce8a3cfac5c31c2593)
diff --git a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts
index 9acc910..aaa0800 100644
--- a/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts
+++ b/polygerrit-ui/app/elements/change/gr-change-view/gr-change-view.ts
@@ -34,7 +34,7 @@
 import {ChangeStarToggleStarDetail} from '../../shared/gr-change-star/gr-change-star';
 import {GrEditConstants} from '../../edit/gr-edit-constants';
 import {pluralize} from '../../../utils/string-util';
-import {whenVisible, windowLocationReload} from '../../../utils/dom-util';
+import {whenVisible} from '../../../utils/dom-util';
 import {navigationToken} from '../../core/gr-navigation/gr-navigation';
 import {RevisionInfo as RevisionInfoClass} from '../../shared/revision-info/revision-info';
 import {
@@ -1764,7 +1764,7 @@
 
         this.latestCommitMessage = this.prepareCommitMsgForLinkify(message);
         this.editingCommitMessage = false;
-        this.reloadWindow();
+        fireReload(this, true);
       })
       .catch(() => {
         assertIsDefined(this.commitMessageEditor);
@@ -1772,10 +1772,6 @@
       });
   }
 
-  private reloadWindow() {
-    windowLocationReload();
-  }
-
   private handleCommitMessageCancel() {
     this.editingCommitMessage = false;
   }