Lexical based editor todo

In progress

Alignments: Use existing classes for blocks
Alignments: Handle inline block content (image, video)
Table features
Image paste upload
Keyboard shortcuts support
Add ID support to all block types
Link popup menu for cross-content reference
Link heading-based ID reference menu
Image gallery integration for insert
Image gallery integration for form
Drawing gallery integration
Support media src conversions (https://github.com/tinymce/tinymce/blob/release/6.6/modules/tinymce/src/plugins/media/main/ts/core/UrlPatterns.ts)
Media resize support (like images)

Image resizing currently bugged, maybe change to ghost resizer in decorator instead of updating core node.
Removing link around image via button deletes image, not just link
SELECTION_CHANGE_COMMAND not fired when clicking out of a table cell. Prevents toolbar hiding on table unselect.
Template drag/drop not handled when outside core editor area (ignored in margin area).