Changing default hotkeys doesn't update clients who haven't changed their hotkeys.

[PowerfulBacon]

Issue reported from Round ID: 51726 (BeeStation Sage - Roleplay)

Reporting client version: 515.1647

If a client has not changed a hotkey, their setting is still written to the database. This means that when hotkeys get updated, they will conflict.

In addition to this, if a new hotkey conflicts then even after unbinding the old hotkey it will not change the action. Replication step:

• Load an old version of the game where look up is bound to F
• Load the new version of thegame where toggle combat mode is bound to F.
• Reset the keybinding for the look up button, so that it becomes unbound.
• Press 'F', and you will attempt to look up rather than toggle combat mode
• Combat mode toggle will start working if you bind F to the combat mode button manually, even if F was already the button