🐛 Fixed tag with # not generating "hash-" prefix at tag screen

closes https://github.com/TryGhost/Ghost/issues/11105

- Updates slug generation on tag screen to add "hash-" prefix for tags with name starting from #

ghost/admin/app/controllers/tags/tag.js

@@ -89,6 +89,9 @@ export default Controller.extend({
         // Generate slug based on name for new tag when empty
         if (propKey === 'name' && !tag.get('slug') && isNewTag) {
             let slugValue = slugify(newValue);
+            if (/^#/.test(newValue)) {
+                slugValue = 'hash-' + slugValue;
+            }
             tag.set('slug', slugValue);
         }
         // TODO: This is required until .validate/.save mark fields as validated