inner list support required.

[taojoe]

the editor should support inner list.
please see the quill editor on the website https://quilljs.com/docs/formats

Steps to Reproduce

1. clone repo
2. run example
3. keyboard "tab" switches focus to another widget, not indent list item.

Logs

[Amir-P]

It's a work in progress and you can test it by cloning from it's PR (#564) origin. @taojoe
I think I will get it ready to get merged by the end of this week. @pulyaevskiy

[taojoe]

It's a work in progress and you can test it by cloning from it's PR (#564) origin. @taojoe I think I will get it ready to get merged by the end of this week. @pulyaevskiy

@Amir-P Thanks, that's great. I'll wait for it.

[Amir-P]

You can test indentation and inner list from #593 . Hope @pulyaevskiy finds the time to review it. @taojoe