pull-request: lock button when updating reviewers to forbid multi-submit.

- fixed some small UI issues found.

rhodecode/model/pull_request.py

@@ -886,20 +886,22 b' class PullRequestModel(BaseModel):'
             reviewer = PullRequestReviewers(_usr, pull_request, reasons)
             Session().add(reviewer)
 
-        self.notify_reviewers(pull_request, ids_to_add)
-
         for uid in ids_to_remove:
             changed = True
-            reviewer = PullRequestReviewers.query()\
+            reviewers = PullRequestReviewers.query()\
                 .filter(PullRequestReviewers.user_id == uid,
                         PullRequestReviewers.pull_request == pull_request)\
-                .scalar()
-            if reviewer:
-                Session().delete(reviewer)
+                .all()
+            # use .all() in case we accidentally added the same person twice
+            # this CAN happen due to the lack of DB checks
+            for obj in reviewers:
+                Session().delete(obj)
+
         if changed:
             pull_request.updated_on = datetime.datetime.now()
             Session().add(pull_request)
 
+        self.notify_reviewers(pull_request, ids_to_add)
         return ids_to_add, ids_to_remove
 
     def get_url(self, pull_request):

rhodecode/public/css/main.less

@@ -1329,13 +1329,6 b' table.integrations {'
     .reviewer {
         float: left;
     }
-
-    &.to-delete {
-        .user,
-        .reviewer {
-            text-decoration: line-through;
-        }
-    }
 }
 
 .reviewer_member_remove {

rhodecode/public/js/src/rhodecode/pullrequests.js

@@ -28,11 +28,12 b' var removeReviewMember = function(review'
 
     if(mark_delete === true){
         if (reviewer){
-            // mark as to-remove
+            // now delete the input
+            $('#reviewer_{0} input'.format(reviewer_id)).remove();
+            // mark as to-delete
             var obj = $('#reviewer_{0}_name'.format(reviewer_id));
             obj.addClass('to-delete');
-            // now delete the input
-            $('#reviewer_{0} input'.format(reviewer_id)).remove();
+            obj.css({"text-decoration":"line-through", "opacity": 0.5});
         }
     }
     else{

rhodecode/templates/pullrequests/pullrequest_show.mako

@@ -362,7 +362,7 b''
                <div id="reviewers_container"></div>
             </div>
             <div>
-             <span id="update_pull_request" class="btn btn-small">${_('Save Changes')}</span>
+             <button id="update_pull_request" class="btn btn-small">${_('Save Changes')}</button>
             </div>
             %endif
           </div>
@@ -766,6 +766,9 b''
             });
 
             $('#update_pull_request').on('click', function(e){
+                $(this).attr('disabled', 'disabled');
+                $(this).addClass('disabled');
+                $(this).html(_gettext('saving...'));
                 updateReviewers(undefined, "${c.repo_name}", "${c.pull_request.pull_request_id}");
             });