closing partially feature #2848
adding operation "Delete selection" associated to existing checkboxes
It is available only for admins and publishers.
Feature #4149 : user account validity
- changing the management of user accessLevel information
- modifying unit tests datasets around users
- deleting some dead code
- refactoring some code
Merge branch 'master' into feature-4149
Merge branch 'master' into feature-4149
Merge branch 'master' into ney-feature2848

Conflicts:
	kmelia/kmelia-config/src/main/config/properties/org/silverpeas/kmelia/multilang/kmeliaBundle.properties
	kmelia/kmelia-config/src/main/config/properties/org/silverpeas/kmelia/multilang/kmeliaBundle_de.properties
	kmelia/kmelia-config/src/main/config/properties/org/silverpeas/kmelia/multilang/kmeliaBundle_en.properties
	kmelia/kmelia-config/src/main/config/properties/org/silverpeas/kmelia/multilang/kmeliaBundle_fr.properties
on feature #2848, adding cut and copy operations on selection
on feature #2848, using i18n javascript plugin to load multilang properties
on feature #2848, removing obsolete JSP file
fixing bug #4220
fixing bug #4219
bug #4231 :  By setting the month before the day of month, when we are at the end of a month with 31 days and we want pass to the next month, instead we pass to two month after. In order to fix this bug, the day of month is set before setting the other date properties (month and year)
Merge branch 'master' of github.com:Silverpeas/Silverpeas-Components
Merge branch 'ney-feature2848'
Adding some test for Yahoo connection in IMAPS (login and password are required for test to pass)
Merge branch 'master' of github.com:Silverpeas/Silverpeas-Components