Ensure tag widget are always displayed (#8)

Author: fcollonval

README.md

@@ -6,10 +6,9 @@ A cell toolbar for JupyterLab.
 
 ![Demonstration](https://raw.githubusercontent.com/fcollonval/jlab-enhanced-cell-toolbar/main/demo_cell_toolbar.gif)
 
-
 ## Requirements
 
-* JupyterLab >= 3.0
+-   JupyterLab >= 3.0
 
 ## Install
 
@@ -35,7 +34,6 @@ or
 conda remove -c conda-forge jlab-enhanced-cell-toolbar
 ```
 
-
 ## Alternatives
 
 Don't like what you see here? Try these other approaches:

src/tagbar.ts

@@ -33,6 +33,8 @@ export class TagTool extends Widget {
     const tags: string[] = (model.metadata.get('tags') as string[]) || [];
     if (tags.length > 0) {
       allTags.pushAll(tags); // We don't care about duplicate here so we can remove all occurrences at will
+    } else {
+      this.refreshTags(); // Force displaying default tags if no tags specified
     }
     model.metadata.changed.connect(this.onCellMetadataChanged, this);
   }