LUA_ADDITIVE_BUTTON_CONTROL causes keypresses to repeat infinitely

When this control mode is set via scripting, almost any keypress will start repeating forever. Only exception I found was the Afterburner. Even quitting a mission and starting another, the same input will continue from the previous mission.

To reproduce, add the script below to your data/tables folder. Then start the game, enter any mission and press a key (some examples: ETS, target next ship, fire countermeasure). The action should start repeating indefinitely.

Tested on 22.0.0-RC5

```
#Conditional Hooks
$Application: FS2_Open

$On Game Init:
[
ba.setButtonControlMode(LUA_ADDITIVE_BUTTON_CONTROL)
]

#End
```