improve editor

Try to:

• Make component size (not pos) scale with container size
• Implement some kind of snapping

changed milestone to %Vecka 16

added Client Development labels

created branch 128-improve-editor to address this issue

done: -centering y/x

-size & pos scale with container size

-lock aspect ratio with shift

todo: -clean up code

1. Remove scale prop? (can mby be done in component instead)
2. Refactor hover component (mby make outline a pixel more outward to show better on images)
3. More comments to explain multiplication and divison by scale variable

mentioned in merge request !94 (merged)

closed with merge request !94 (merged)