Merge branch 'stable-2.8' into stable-2.9

* stable-2.8:
  Access-control: Adding drafts to examples
  Hide `refs/heads/` prefix in cherry-pick branch suggestion list
  Disable "save" button while saving commit message edit

Change-Id: Ib8bdf19e8e692025f015f9b85326caf78302ac8e

Documentation/access-control.txt

@@ -840,6 +840,17 @@ Suggested access rights to grant:
 * xref:category_push[`Push`] to 'refs/for/refs/heads/*'
 * link:config-labels.html#label_Code-Review[`Code-Review`] with range '-1' to '+1' for 'refs/heads/*'
 
+If it's desired to have the possibility to upload temporarily hidden
+changes there's a specific permission for that.  This enables someone
+to add specific reviewers for early feedback before making the change
+publically visible.  If you want to allow others than the owners to
+publish a draft you also need to grant them `Publish Drafts`.
+
+Optional access rights to grant:
+
+* xref:category_push[`Push`] to 'refs/drafts/*'
+* xref:category_publish_drafts[`Publish Drafts`] to 'refs/heads/*'
+
 
 [[examples_developer]]
 === Developer

gerrit-gwtui/src/main/java/com/google/gerrit/client/change/EditMessageBox.java

@@ -76,6 +76,7 @@ class EditMessageBox extends Composite {
 
   @UiHandler("save")
   void onSave(ClickEvent e) {
+    save.setEnabled(false);
     ChangeApi.message(changeId.get(), revision, message.getText().trim(),
         new GerritCallback<JavaScriptObject>() {
           @Override

gerrit-gwtui/src/main/java/com/google/gerrit/client/ui/CherryPickDialog.java

@@ -93,6 +93,10 @@ public abstract class CherryPickDialog extends ActionDialog {
 
     @Override
     public String getDisplayString() {
+      final String refsHeads = "refs/heads/";
+      if (branch.ref().startsWith(refsHeads)) {
+        return branch.ref().substring(refsHeads.length());
+      }
       return branch.ref();
     }