Add an option to unlink the buttons from the vanilla practice

[SwordJhon]

Is your feature request related to a problem? Please describe.
Having the add/delete Pcheckpoints next to the vanilla ones is kinda unoptimal for mobile players.

Describe the solution you'd like
Have an option to unlink these buttons from the vanilla ones, and be able to move them separately from the vanilla checkpoint buttons.

Describe alternatives you've considered
I kinda don't understand this one, maybe just add a toggle to put these buttons above the vanilla ones instead of to the sides?

Additional context

[Kevadroz]

I could do the alternative, unfortunately unlinking the buttons would be a bit complicated and I'm not in the mood to do active development for this mod anymore, but I can add a toggle to put the buttons above or below the vanilla ones and add a unlink option whenever I return to fully finish this mod.

[Kevadroz]

Partially implemented