Allow resizing with drag handles

[Glodenox]

Instead of working with buttons, it would be nicer if it was possible to stretch and move overlays with dragging handles. This should be possible with OpenLayers controls.

[roadtechie]

Thank you! Unable to use this script currently due to how course the adjustments are with enlarging/downszing. This used to work great so I am assuming the last WME update broke this.

[Glodenox]

There was indeed an issue that I fixed, but apparently I made an error in my calculations which made it impossible to make changes smaller than 5% - which is obviously too much. I've adjusted this to 1% now and added a sensitivity slider that allows to further adjust this up to 0.01% if needed.

That doesn't fix this issue though. I'd like to find an easier way to line up an image on the map than those buttons.