[feature] auto click for other key combos than attack/use

[sebseb7]

it would be nice to have auto click ability on any key combo.

implementation idea:

• add button "add key group"
• for each key group created:
  • interval in ticks
  • toggle key
  • "add key"-button for adding the keys to be pressed at an interval when this group gets toggled.

it should be possible that the keypress issued by one key-group can be the toggle key for another key group.