Fix proxy of playlist aspect ratio broken on some locales
Make monitor ruler slightly bigger so it's easier to click for seeking
Try to avoid locale errors when converting double
Fix some MLT effects (Mono to Stereo was showing twice the "To" param)
Fix unnecessary refresh of effect stack, set effect param description as tooltip
Fix monitor focus on ruler wheel event
Try to fix monitor confusion: http://kdenlive.org/mantis/view.php?id=2986
Warn before overwriting stabilized clip