* chore(block-tune-toggler): toggler moved to the left (draft)
* toolbox ui updated
* fixd caret jumpling, improved some styles
* toolbar moving by block-hover
- UI module triggers 'block-hovered' event
- Toolbar uses 'block-hovered' for appearing
- `currentBlock` setter added to the BlockManager
- (reactangle-selection): the throttling added to the mousemove and scroll handlers
- `getBlockIndex` method added to the Api
- (api-blocks): toolbar moving logic removed from `blocks.move()` and `blocks.swap()` methods. Instead, MoveUp and MoveDown tunes uses Toolbar API
* the dark-theme to the example-dev.html
* positioning improved
* fix(rectangle-selection): first click after RS does not clears selection state
* toolbox position fixed
* the toolbox module became a standalone class
- Toolbox became a standalone class from the editor module. It can be accessed only via the owner (the Toolbar module)
- (api.blocks) the insert() method now has the `replace` param. Also, it returns inserted Block API now.
* new(api.listeners): `on()` now returns the listener id. The new `offById()` method added
* fix bug with Tab pressing on hovered but not focused block
* mobile version improved
* upd example dev
* small updaets
* add nested-list
* linting
* (api.toolbar): `toggleBlockSettings` now fires toggling event with the same state
* EventDispatcher used instead of callbacks for the Toolbox
* UIApi added
* fix ci
* git submodules removed from the ci flow
* add paragraph submodule to the ci flow
* Update CHANGELOG.md
* Update package.json
* use ubuntu-latest for chrome ci
* Use "npm dist-tag add" instead of "yarn tag add"
`yarn tag add` somehow throws an error for existing versions, but `npm dist-tag add` works correctly.
resolve#1692
* Remove space
