Hotkey to start testing from checkpoint last tested from

[skybaks]

[skybaks]

Some initial testing showed that we can use void TestMapFromCoord(int3 Coord, CGameEditorPluginMap::ECardinalDirections Dir); to start at an integer coordinate. But that uses the basic shootmania arena mode.
Trying to launch into test mode using the TrackMania/TM_RaceTest_Local.Script.txt mode did not seem to work and actually locked up the editor. More investigation is needed here.

[skybaks]

There appears to be some *.LaunchedCP.Gbx files in the ProgramData cache that may be related to this. It bears an investigation as to what might be in those files.