Popup disclaimer for commercial layers on demo is annoying

[markvolzlyoncounty]

When a commercial layer is selected on the demo site a popup is displayed for every map interaction (pan, zoom etc). I find this somewhat annoying.

possible alternatives to consider:

1) only show the popup once when a user switches commercial layers.

2) show the popup in a location other than the center of the screen.

[theduckylittle]

r778

Related to: #92

[EliL]

This ticket and #92 can be observed as fixed in the trunk demo and in a local setup as well. Please remember to test and close tickets when work is done.