[Homerow Mode] Shift+U sends Delete+Cmd+Alt+Ctrl+Shift

I'm using this mapped to Delete Line in Sublime Text
[Homerow Mode] P to Foward Delete

Shift+P sends FowardDelete+Cmd+Alt+Ctrl+Shift
(Using this mapped to FowardDelete Line in Sublime Text)
[Homerow Mode] Add KeyOverlayModifier to E: Cmd+Option+Ctrl

Since E is mapped to Find (cmd+f), I'm mapping E + Undo/Redo to
Jump Back/Forward in Sublime Text 3.
This is an attempt to use the following analogy:
"undo/redo for find or caret location"
Merge pull request #183 from aristidesfl/homerow-features

Some Homerow Mode features