SuperG+ Super G Plus - SMA and 26mm long GPS Mount

This is a remix of FPV_vibes's Super G Plus mount (thank you!):

# Changes
* Increased height of the SMA cutout by 2mm to reduce stress on the SMA pigtail
* Removed unused SMA mounting holes; not required for Mach3 pigtail
* Shorter walls on GPS mount for reduced weight and increased durability
* Enlarged cutout for GPS wiring
* Longer GPS tray to accommodate more modules

# GPS Modules

I've used the following. Most of these will *not* fit the original design:

* Matek SAM-M8Q
* M