Add possibility to add actions for hotkeys.

[EgzoT]

System for binding predefined actions with hotkeys module.

Api for external mods/modules.

Add action to action list:
modules.game_hotkeys.addAction(moduleName, actionName, function)

Remove action from action list:
modules.game_hotkeys.removeAction(moduleName, actionName)
or for all module actions:
modules.game_hotkeys.removeAction(moduleName)

How it's look in game_hotkeys module (new buttons "Add action" / "Clear action", new hotkey type "Action"):

List with actions:

• Added first action - [game_hotkeys] [toggle] - toggle hotkeys window.

Limitations:

• To add action, mod/module must be load after game_hotkeys module.
• Module game_hotkeys works only after login to game.

Related with:
edubart#217