fix: tag rename to empty string should preserve its original title

app/assets/javascripts/views/tags/tags_view.ts

@@ -267,6 +267,7 @@ class TagsViewCtrl extends PureViewCtrl<unknown, TagState> {
 
   async clickedAddNewTag() {
     if (this.getState().editingTag) {
+      console.log('editing');
       return;
     }
     const newTag = await this.application.createTemplateItem(
@@ -289,10 +290,10 @@ class TagsViewCtrl extends PureViewCtrl<unknown, TagState> {
 
   async saveTag($event: Event, tag: SNTag) {
     ($event.target! as HTMLInputElement).blur();
-    if (!this.titles[tag.uuid]?.length) {
-      return this.undoCreateTag(tag);
-    }
     if (this.getState().templateTag) {
+      if (!this.titles[tag.uuid]?.length) {
+        return this.undoCreateTag(tag);
+      }
       return this.saveNewTag();
     } else {
       return this.saveTagRename(tag);
@@ -314,6 +315,9 @@ class TagsViewCtrl extends PureViewCtrl<unknown, TagState> {
     if (newTitle.length === 0) {
       this.titles[tag.uuid] = this.editingOriginalName;
       this.editingOriginalName = undefined;
+      await this.setState({
+        editingTag: undefined
+      });
       return;
     }
     const existingTag = this.application.findTagByTitle(newTitle);