**Background:**
The advanced toolbar (add additional templates, add wikitext, move up/down, remove part) only applies when there is multi-part content. In a typical single template editing situation they cause significant confusion. We will leave the toolbar as is, but hide when it is not relevant and show when it is.
**Requirements**
[] Implement behind a feature flag with:
* {T272368}
* {T272481}
[] When inserting a template or editing a single template, the tool bar is hidden
[] When editing pre-existing multi-part, linked content, the tool bar is shown
[] Each button functions as they currently do:
* Puzzle icon brings up template search and when template is chosen from the dropdown is added to the sidebar and is editable
* [[ ]] icon adds wikitext/content field to the main dialog and sidebar list
* Move up/down arrows allow to move content order in relation to each other. Current disabling behavior remains the same.
* Trashcan removes content
[] Rename 'Content' to 'Wikitext'
[] Trashcan only works when template name or wikitext titles in the sidebar are focused. When parameters are in focus, the trashcan is disabled.
**For reference**
Current toolbar:
{F34097894}
Note: ellipsis/menu implemented in the prototype is not being used in the final design. Some of the above functions were included there but are no longer being moved. See prototype ticket for reference: {T263414}