Do we still need emptyPara for focusing caret?

[lqez]

We've used emptyPara as a non-empty value for browser compatibility issues as like as we discussed on #313.

I want to ask us whether we should use the same rule now or not.
I tested on some browsers on macOS and got errors on breaking paragraph tests but no issue on focusing caret.

If we don't need to use emptyPara, then several related issues can easily disappear.
Please share your opinions, @hackerwins and @easylogic and @diemendesign.

[DennisSuitters]

If removing emptyPara doesn't adversely affect usage, and in turns resolves long-standing issues, then I see it as a good thing.

[1der1]

emptyPara adds unwanted code. Unfortunately, if you don't use it, you get uncaught exceptions. So you have to check for empty nodes when you remove emptyPara.