Required a lot of changes to provide at least a decent attempt at proper
editor teardown control.
Also updates HtmlDescriptionFilter and testing to address issue with bad
child iteration which could lead to missed items.
Renamed editor version from comments to basic as it'll also be used for
item descriptions.
Updated up/down handling to create where a selection candidate does not
exist, to apply to a wider scenario via the selectPrevious/Next methods.
Updated DOM selection change handling to identify single selections
within decorated nodes to select them in full, instead of losing
selection due to partial selection of their contents.
Updated table selection handling so that our colgroups are ignored for
internal selection focus handling.
Now toolbars stay open on mouse-out, and close on other toolbar open,
outside click or an accepted action.
To support:
- Added new system to track and manage open dropdowns.
- Added way for buttons to optionally emit events upon actions.
- Added way to listen for events.
- Used the above to control when dropdowns should hide on action, since
some dont (like overflow containers and split dropdown buttons).
Also:
- Added svg loading support (dummy stub) for jest.
- Updated headless test case due to node changes.
- Split out editor change detected to where appropriate.
- Added functions to help with testing, like mocking our context.
- Updated toolbar to match existing editor, including dynamic RTL/LTR
controls.
- Updated text node handling to not include spans and extra classes when
not needed. Added & update tests to cover.
Changed from using a decorator to using a helper that watches for image
selections to then display a resize helper.
Also changes resizer to use a ghost and apply changes on end instead of
continuosly during resize.
Also added smarter above/below positioning to respond if toolbar would
be off the bottom of the editor, and added hide/show when they'd go
outside editor scroll bounds.
