Fixed issue login message and layout changed, now uses the 'messagebox' class, and has a new header "logged in" which will need translation. Also it now welcomes the user by their actual name, not their login (ie: "Welcome Jason Cleeland" not "Welcome admin")

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/limesurvey@8551 b72ed6b6-b9f8-46b5-92b4-906544132732