fix and tidy up some stuff with the keyframe value edit
small tweaks to QTimelineParam::mouseDown
messing up with git!
Merge commit '3bcca7fd25ad982d42f3c2458b0e99a4eb964005'

Conflicts:
	samples/BasicSample/xcode/BasicSample.xcodeproj/project.xcworkspace/xcuserdata/Q.xcuserdatad/UserInterfaceState.xcuserstate