* include/functions_db.php: return_status_agent() renamed to
get_agent_status(). Improved get_agentmodule_status() documentation
and code.
* include/functions_visual_map.php: Styles correction. Use a switch
instead of many ifs. Fixed get_layout_status() so the bad values have
preference. Fixes#2787197.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@1708 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f