Tidy up markdown toolbar handling across all editors

Any editor for the markdown mode will now automatically get
the markdown toolbar added.

The comment node has been updated to handle this properly and
to not add two copies of its content to the sidebar.

packages/node_modules/@node-red/editor-client/locales/en-US/editor.json

@@ -27,8 +27,7 @@
         "status": "Status",
         "enabled": "Enabled",
         "disabled":"Disabled",
-        "info": "Description",
-        "tip": "Description accepts Markdown and will appear in the Info tab."
+        "info": "Description"
     },
     "menu": {
         "label": {
@@ -279,7 +278,6 @@
         "deleteSubflow": "delete subflow",
         "info": "Description",
         "category": "Category",
-        "format":"markdown format",
         "errors": {
             "noNodesSelected": "<strong>Cannot create subflow</strong>: no nodes selected",
             "multipleInputsToSelection": "<strong>Cannot create subflow</strong>: multiple inputs to selection"
@@ -719,7 +717,8 @@
         "format": "format JSON"
     },
     "markdownEditor": {
-        "title": "Markdown editor"
+        "title": "Markdown editor",
+        "format": "Formatted with markdown"
     },
     "bufferEditor": {
         "title": "Buffer editor",