Fix unicode display: CJK, powerline, tmux (#1536)
Fix unicode display: CJK, powerline, tmux (#1536)

* Fix unicode display with braille compatibility

* Remove duplicated styling

* Clean up changes, fix CJK display only

* Remove exising hterm overides for unicode

* Add insertString override (no changes)

* Wrap unicode chars in individual spans

* fix linting

* Fix unicode encapsulation

* Fix multiple rendering of wide chars

wilsontayar/hyper,zeit/hyper,MartyGentillon/hyper,derrickpelletier/hyper,ppot/hyper,chabou/hyper,zeit/hyper,zeit/hyper,chabou/hyper,spncrgr/hyper,ppot/hyper,rickycodes/hyper,derrickpelletier/hyper,rickycodes/hyper,reslaurentii/hyper,whitelynx/hyperterm,reslaurentii/hyper,chabou/hyper,wilsontayar/hyper,ppot/hyper,KunalKene1797/hyper,MartyGentillon/hyper,zeit/hyperterm,spncrgr/hyper,KunalKene1797/hyper,zeit/hyperterm,whitelynx/hyperterm,zeit/hyper