[BUG] Utterance slots are difficult to edit

[ptrckbp]

If you try to press enter at the end of a line, it will create an empty line, then the caret will jump to the next line. If you press at the right of the line, the caret will appear at the beginning. The first spacebar at the end of the slot is typed after the slot. At least, none of these problems are breaking, just making things more difficult to use.

[Java88888888]

Man, I also met the same problem, I try to repair, is a question of SLATE - react plug-in, refer to the https://github.com/ianstormtaylor/slate/pull/2454/files