Allow adjustable PTZ control size

[dmakovec]

[REQUIRED] Describe the feature you'd like:

On a mobile, I find the PTZ controls difficult to use with my fat fingers and would like to enlarge them. While I've come across live -> controls -> ptz -> style, size/width/height only affects the control container and not the individual buttons themselves. Can there be a way to specify sizes of the buttons to make them more accessible?

[OPTIONAL] Describe alternatives you've considered:

Disabling PTZ controls and adding buttons to the dashboard outside of the card itself.

[OPTIONAL] Additional context:

Add any other context or screenshots about the feature request here.