Create tag on ui (#13467)

Support create single tag directly

support create tag with message from create release ui

Signed-off-by: a1012112796 <1012112796@qq.com>
Co-authored-by: Lauris BH <lauris@nix.lv>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: zeripath <art27@cantab.net>

web_src/js/index.js

@@ -3310,6 +3310,7 @@ function initFilterBranchTagDropdown(selector) {
       noResults: '',
       canCreateBranch: false,
       menuVisible: false,
+      createTag: false,
       active: 0
     };
     $data.find('.item').each(function () {
@@ -3341,7 +3342,7 @@ function initFilterBranchTagDropdown(selector) {
           return this.filteredItems.length === 0 && !this.showCreateNewBranch;
         },
         showCreateNewBranch() {
-          if (!this.canCreateBranch || !this.searchTerm || this.mode === 'tags') {
+          if (!this.canCreateBranch || !this.searchTerm) {
             return false;
           }