Intuitive Movement Commands

### Is your feature request related to a problem? Please describe.
It's frustrating needing to move character by character in a commit message, coming from git gui.

### Describe the solution you'd like
Pressing Ctrl + LeftArrow/RightArrow should move the cursor one word to the left/right.
Pressing Ctrl + Backspace should delete the word before the cursor.
Pressing Ctrl + Delete should delete the word after the cursor.

### Describe alternatives you've considered
I don't think there are any, really, this is default behavior in most text editors and also git gui.