* For each texture you view, it will reset back to mip 0 and slice 0
as it previously did, and it will also reset the channels back to
RGB only, which is new behaviour.
* Then each texture remembers those settings, so if you choose to view
slice 6 & alpha only of a texture any time you switch back to it
you'll see slice 6 & alpha only.
* It can be disabled in the options, but this is the new default
behaviour. Possibly in future the zoom level and visible range might
be rolled into this, but for now I think they might work better as
global state.
* This allows you to hook into processes that are difficult to launch
directly with the existing functionality in RenderDoc.
* This is rather risky, as it modifies the AppInit_DLLs registry key to
inject a small shim dll that checks for the desired process and injects
the full renderdoc.dll. If that registry key got left, or if there was
some incompatibility with the shim dll, you could have problems. It
should only ever be used as a last resort if there's no other way to
capture.