"forceBalance" behaves differently in rust port

[eraserhd]

(foo [:bar|])

Press <Enter>.

JavaScript:

(foo [:bar])
      |

Rust (the same as without "forceBalance"):

(foo [:bar
      |])

[cbcoutinho]

Similarly, after hitting enter - I'm unable to use backspace to delete empty space or return to previous line because the temporary 'forceBalance' function refuses to be out of balance. I would personally prefer the JavaScript behavior where parens are only moved down when there are characters to be wrapped - currently it focuses too much on the cursor IMHO

[eraserhd]

@cbcoutinho Hopefully, once I get forceBalance working, this will be resolved. But will check again then.