Redesign app bar when configuring key maps

[sds100]

Have you checked if an issue already exists for this feature request?

• Nobody else has requested this feature before

What feature would you like added?

• Remove done button. Changes save automatically.
• Add undo/redo.
• Naming key maps follows same appbar textfield convention as naming key map groups.
• Remove help button.

App version

No response

Device model and manufacturer

No response

Extra info

• My device is rooted