Cancel a render while parsing

[ValeroStudio]

sometimes you click R and then realize you forgot something. Its annoying to have to wait for the VFB to open.

[dkendig]

trying to speed up parsing time so it's not such a long wait. Unfortunately the UI is kind of locked up while the parsing is going on, so getting user input during that process isn't really possible at the moment.

[ValeroStudio]

Faster parsing would be flippin awesome!