Geomap: Fixed issue with adding a custom basemap.

Fixes #5698. Fixes #5298.
Switch to a compiled version of openlayers
Follow up to #5983
Geomap: fix wb-ready event and cities layer visibility.
Tabs: Added wb-shift.wb-tabs to the documentation
Tabs: Specified that wb-shift.wb-tabs event is only used by the carousel
Multimedia: Add cuepoint functionnality
Prevents boutons styles from being applied outside the control bar