[FEAT-REQ] Please Add Essential Keys Toolbar. Access from mobile browsers is unusable due to lack of necessary keys

[Emasoft]

Feature Request: Please Add Essential Keys Toolbar.
Reason: Access from mobile browsers is unusable due to lack of necessary keys

Illustration:

Additional requirements:

• Make the modifier keys being permanently selected when double clicked.
  So:
  1-click --> modifier on for only one key
  2-clicks --> modifier on until clicked again to switch it off
• Support auto keystroke repeat when holding arrow keys or page change keys