Changes:
- MemoryWindow was cleaned up and gives more feedback on searches.
Some bugs were fixed as well:
- A complex bug that allowed tearing off tabs and opening multiple
copies of a debug panel which lead to segfaults
- Another segfault related to right-click menus on code/memory views
when those tools were floating in their own window.
Should be GetGPRName not GetGRPName.
Removed an unnecessary extern declaration of GetGRPName in RegisterWindow.cpp.
Also added GetFPRName to the PowerPCDisasm header for consistency.