fnHandleAppsOverlay = function() {
						var $Overlay = jQuery(".sapMSinglePCOverlay");

						setTimeout(function() {
							$Overlay.addClass("sapMSinglePCOverlayDragging");
						});

						jQuery(document).one("dragend", function() {
							$Overlay.removeClass("sapMSinglePCOverlayDragging");
						});
					}
Selects or deselects an appointment that is passed as a parameter. If it is selected, it is going to be
deselected and vice versa. If modifier keys are pressed - the previously selected appointments will be
preserved.

@param {sap.m.CalendarAppointment} oAppointment The appointment to be selected/deselected.
@param {boolean} [bRemoveOldSelection=false] If true, previously selected appointments will be deselected.
@returns {array} Array of the appointments with changed selected state
@private