More precise positioning

[hcallens]

Because of the small size of the hotspot image in the editor it is hard to position the cross icons precisely. It would be very useful to be able to adjust their position more exactly.

Possible enhancements:

• Hotspot position section in the editor: show in full page width instead of thumbnail. Please change .image-coordinate-selector to a max-width of 750px instead of 250.
• adding an ID to each hotspot div - this would make it possible to adjust the position by overriding css
• Add a +/- horizontal and +/- vertical fields to adjust the position.
• Also if one could click and drag the hotspot instead of just click, it would be easier.