Implement Turbo Speed

[Saturo78]

Context

MessagEase has a Turbo Speed Mod. I would like to use it with flickboard to.

Describe your suggested feature

If turbo speed is activated, only characters that are also displayed on the main keyboard are entered. Turbo Speed reduces the number of typing errors and increases your speed.

Other details

Please also implement:

Display these additional characters on the main keyboard. These characters are also included in Turbo Speed.

Acknowledgements

• [X] I have searched the existing issues and this is a new one, NOT a duplicate or related to another open issue.
• [X] This is a single feature request, in case of multiple feature requests I will open a separate issue for each one (they can always link to each other if related)
• [X] I have written a short but informative title.
• [X] I have checked through the app settings for my feature.
• [X] I will fill out all of the requested information in this form.

[nightkr]

Hi, this is already implemented under "Aesthetics" -> "Enable hidden actions".

[Saturo78]

I know this option but there is no way to specify the selection of characters like in Messagease. Turbo Speed means use only the specified hidden characters not all.