Pickers for one or more locations

The new spacePicker Velocity macro displays a suggest input to pick one or more locations as you type. The new compactLocationPicker Velocity macro adds a button next to it, which opens a page tree in a drop down to browse for the locations as an alternative. A wiki macro parameter of type java.util.List<org.xwiki.model.reference.SpaceReference> is now edited with the compact location picker. Learn how to use them.