fixing bug #3976
bug #4007 :  Now the expired sessions are well closed after a given time out as expected
fixing bug #3924
bug #4014 :  Load now the groups per page in the filtering panel and maintain them in a cache so that the pagination can ran more faster. Some bugs require to be fixed in the groups cache management with the filtering panel
bug #4014 :  Fix the bugs in the groups cache management and externalize it into a dedicated object. The selection of all groups is also rewritten as they can be not all yet loaded
bug #4014 :  Merge branch 'core-5.11.x' of github.com:Silverpeas/Silverpeas-Core into bug-4014
bug #4014 :  Add localized label of 'next groups' and fix a little bug with the rendering of the next groups link