GE Debugger: Add filter to skip prim calls

[unknownbrackets]

This allows you to cut prims from the scene as desired.

Usage: you select the option from Actions, and then you can enter something along the lines of:

• 0-1000 to execute the first 1001 prim calls only.
• !0-5,!100 to skip prim calls 0 through 5 as well 100.
• 6-99,101-99999 to equivalently skip prim calls 0 through 5, as well as 100.
• Blank or * to stop skipping.

This makes it easier to validate "what if" theories and also examine how much certain prim calls are impacting performance.

Note: the cuts intentionally affect recording.

-[Unknown]

[hrydgard]

Cool feature!