The default 1st line highlighting confused users when existing on
read-only blocks as it was not clear this represented the active line.
This changes the highlight to only show when the block is focused upon.
- Updated event naming to be "cm6" when codemirror-specific.
- Removed cm block border in md editor to prevent double bordering.
- Updated copy handling to fallback to execCommand.
- Fixed some keybindings not running as expected, due to some editor
defaults overriding or further actions taking place since the action
would not indicate it's been dealt with (by returning boolean).
- Fixed spacing/border-radius being used on codeblocks on non-intended
areas like the MD editor.
- Fixed lack of BG on default light theme, visible on full screen md
editor.
- Fixed error thrown when the user does not have access to change the
current editor (Likely non-cm related existing issue)
- Updated clipboard handling
- Removed old clipboard package for browser-native API.
- Updated codemirror editor events to use new props for new data types.
