Remove action to display Persons related to the Group Calendar because it is obsolete
Add Group Calendar Assignment portal type. It will be used to set the relation with the source and the period
Remove field because relation between person Assignments and Group Calendar is obsolete
remove the calendar base category on Assignment portal type because the relation between Assignment and Group Calendar is obsolete
Add GroupCalendarAssignment class
Add GroupCalendarAssignment class
Revert "Add GroupCalendarAssignment class" because was commited by mistake

This reverts commit cbf5d46e3c1d3e76c6a5376e08617851ce03773c.
Add Group Calendar Assingment view and Group Calendar tab to view Group Calendar Assingments
Improve code to generate movements for each Group Presence Period according to the period
Move changes on asMovementList method from PresencePeriod to GroupCalendarAssignment to keep Leave Period working as Expected.
Remove trailing whitespaces
Improve sql query to consider only accountable lines and get the avaibility with many nodes in the same query