Backspace propagation bug in mathlive 0.99.0

[anisabboud]

I'm using mathlive inside Quill.

• In v0.98.6, inserting a mathlive field and typing 123, then hitting backspace would delete just the "3" (makes sense).
• In v0.99.0 (released yesterday), inserting a mathlive field and typing 123, then hitting backspace would delete the entire field (bug).
  It seems like in certain cases the backspace is propagating outside the field, so it's getting caught by quill, thus deleting the field.

This might be related to bd1c061 and evt.preventDefault(); / evt.stopPropagation(); (haven't looked closely yet).

[arnog]

Hmmm... In some cases, backspace now does an Undo. I think that's what's going on here.