Fix tag reversion UI (#3295)

* Remove unused check

The tags returned from the tag history endpoint did not have
an image_id field until https://github.com/quay/quay/pull/3238 (tags pagination), so the
condition was never met. After #3238, the tags returned from the tag
history endpoints have an image_id field, which is equal to its
docker_image_id field, to allow the same behavior from consumers
getting tags from the repository endpoint (e.g repo-view).

* watch repositoryTags instead of repository in repo-tag-history

static/directives/repo-tag-history.html

@@ -111,7 +111,7 @@
      </table>
    </div>
 
-  <div class="tag-operations-dialog" repository="repository"
+  <div class="tag-operations-dialog" repository="repository" repository-tags="repositoryTags"
      image-loader="imageLoader"
      action-handler="tagActionHandler"></div>
 

static/js/directives/ui/repo-tag-history.js

@@ -10,6 +10,7 @@ angular.module('quay').directive('repoTagHistory', function () {
     restrict: 'C',
     scope: {
       'repository': '=repository',
+      'repositoryTags': '=repositoryTags',
       'filter': '=filter',
       'isEnabled': '=isEnabled',
       'imageLoader': '=imageLoader'
@@ -34,7 +35,7 @@ angular.module('quay').directive('repoTagHistory', function () {
       };
 
       $scope.$watch('isEnabled', loadTimeline);
-      $scope.$watch('repository', loadTimeline);
+      $scope.$watch('repositoryTags', loadTimeline);
 
       var processTags = function(tags) {
         var entries = [];
@@ -176,4 +177,4 @@ angular.module('quay').directive('repoTagHistory', function () {
     }
   };
   return directiveDefinitionObject;
-});
+});

static/js/directives/ui/tag-operations-dialog.js

@@ -389,11 +389,6 @@ angular.module('quay').directive('tagOperationsDialog', function () {
             return;
           }
 
-          if (tag.image_id == image_id) {
-            bootbox.alert('This is the current image for the tag');
-            return;
-          }
-
           $scope.restoreTagInfo = {
             'tag': tag,
             'image_id': image_id,

static/partials/repo-view.html

@@ -89,6 +89,7 @@
             <h3 class="tab-header">Tag History</h3>
             <div class="repo-tag-history"
                  repository="viewScope.repository"
+                 repository-tags="viewScope.repositoryTags"
                  filter="viewScope.historyFilter"
                  image-loader="viewScope.imageLoader"
                  is-enabled="historyShown"></div>