CS-5897 Wrong display of settings context menu when there is a lot of calendars

Fix description: Top position of context menu is already defined in function swapMenu in UICalendarPortlet.js.
But it's re-defined in function calendarMenuCallback of UICalendars.js.
So we need to remove this re-definition of top position of context menu.
CS-5896 Wrong private calendar URL

Fix description: correct private calendar URL