fix(registry): Performance issues with Registry Manager (#2648)

* fix(registry): fetch datatable details on page/filter/order state change instead of fetching all data on first load

* fix(registry): fetch tags datatable details on state change instead of fetching all data on first load

* fix(registry): add pagination support for tags + loading display on data load

* fix(registry): debounce on text filter to avoid querying transient matching values

* refactor(registry): rebase on latest develop

* feat(registries): background tags and optimisation -- need code cleanup and for-await-of to cancel on page leave

* refactor(registry-management): code cleanup

* feat(registry): most optimized version -- need fix for add/retag

* fix(registry): addTag working without page reload

* fix(registry): retag working without reload

* fix(registry): remove tag working without reload

* fix(registry): remove repository working with latest changes

* fix(registry): disable cache on firefox

* feat(registry): use jquery for all 'most used' manifests requests

* feat(registry): retag with progression + rewrite manifest REST service to jquery

* fix(registry): remove forgotten DI

* fix(registry): pagination on repository details

* refactor(registry): info message + hidding images count until fetch has been done

* fix(registry): fix selection reset deleting selectAll function and not resetting status

* fix(registry): resetSelection was trying to set value on a getter

* fix(registry): tags were dropped when too much tags were impacted by a tag removal

* fix(registry): firefox add tag + progression

* refactor(registry): rewording of elements

* style(registry): add space between buttons and texts in status elements

* fix(registry): cancelling a retag/delete action was not removing the status panel

* fix(registry): tags count of empty repositories

* feat(registry): reload page on action cancel to avoid desync

* feat(registry): uncancellable modal on long operations

* feat(registry): modal now closes on error + modal message improvement

* feat(registries): remove empty repositories from the list

* fix(registry): various bugfixes

* feat(registry): independant timer on async actions + modal fix

app/docker/helpers/imageHelper.js

@@ -6,6 +6,12 @@ angular.module('portainer.docker')
 
   var helper = {};
 
+  helper.isValidTag = isValidTag;
+
+  function isValidTag(tag) {
+    return tag.match(/^(?![\.\-])([a-zA-Z0-9\_\.\-])+$/g);
+  }
+
   helper.extractImageAndRegistryFromRepository = function(repository) {
     var slashCount = _.countBy(repository)['/'];
     var registry = null;