Fix condition in conf/authentication.conf
Add CSS of date-picker in users module
Reset the save btn when user form is invalid
Fix template-toolkit warning in user/read.tt
Pimp minor glitches in users and nodes searches

 - links of list items must have a href attribute for the mouse pointer
   to be properly set;
 - the input field of the "save search as" form is automatically focus
   when showing the modal;
 - the trash icon on the right side of the searches names is now
   properly aligned