* show the toolbar (WIP - includes some hacks and todos)
* allow calling component to pass additional toolbar elements
* add templates behaviour
* get templates working
* tweaks following mention autocomplete refactor
* remove image upload handler no longer needed
* rename method
* some small refactors
* only comment text area controls visibility of templates area
* fix error in role name
* fix mobile view
* update specs
* initial add of toolbar to v2 editor WIP
* fix Form test knocked out by rebase
* basic image upload functionality added to toolbar
* add cypress tests for toolbar
* move image tests to previous cypress spec
* test markdown insertion from buttons in jest
* small tidy up
* remove right padding in scrollable layout, hide scrollbar
* update tests following new line changes
* add more doc comments
* tweak padding css
* create constant for image placeholder
* add image uploader change missed in staging after merge conflict resolution
