Add long press duration

[matteo-dinoia]

Checklist

• I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• This issue contains only one feature request.
• I have read and understood the contribution guidelines.
• I optionally donated to support the Fossify mission.

Feature description

Add a settings to customize the length that is required to press buttons so that a tap is considered a long press. That could be a slider, a number or some premade setting (low, medium, high) but I would suggest a number (with maybe a slider).

Why do you want this feature?

For now it is too slow and it is hard to type fast expecially in languages with a lot of accents. Also this setting is present in most keyboard application for accessubility settings.

Additional information

This is the only major problem keeping me from switching to this keyboard app.