* Old files now get initialised with the correct scale. The wrong calculation was being used
* Added a new tool to Alt-S menu: "Apply Scale"
This tool causes all the keyframes in the active strip to be moved to their NLA-scaled times, the scale to be set to 1.0, and the frame ranges recalculated accordingly (to remove any nasty weird errors)
* Scale field now draws red when the action-range is < 1, and the tooltip in this case instructs the user how to fix this (by using "Apply Scale").