Add Zoom buttons to list of function panel buttons

I prefer the Zoom buttons of Locus Map 3:

• more readable in sunlight
• more compact screen layout/ less wasted map space
• more reliable to tap (more surrounding guard area)
• supports larger sizing based on expert setting config.cfg dev_gui_main_rescale_value

Contrast this with Locus Map 4:

• buttons sometimes "blend" in with map content
• white buttons sometimes have poor contrast with map background
• sometimes wasted map space
• no support for larger sizing

My simple suggestion is to add the two Zoom buttons as two new independent items in the already extensive list (60+ buttons) of function panel buttons: settings > Controlling > Panels & Buttons > Set functions panels > +Add function button > add each button.

This would not affect any existing user.

Note it is already possible to hide the Zoom buttons: settings > Controlling > Panels & Buttons > Zoom buttons: Hidden.

It would allow zoom buttons to be placed in the 1) bottom panel ALA LM3 2) side panels - left or right 3) existing on-map position. And automatically this feature is available in Presets!

Great flexibility in placement!