Changes of version 2.17

Release 2.17 from 23. October '15

uses the crowd source translation via weblate.org
allows to restart and stop downloads
uses version 3.21 of the Google Maps API for the Online Edition
allows users of the Offline Edition to download routing and elevation data together with the maps where they're needed
splits up the maps and themes dialog of the Offline Edition to 2 dialogs and makes their tables sortable
scans for missing files in the download queue and adds them if required to keep them current
searches in the download queue for downloads that need to be updated and marks them as outdated
shows the wait cursor when downloading categories from the RouteCatalog which unfortunately doesn't work when expanding the tree with the plus "+"
fixes a bug where the insertion of waypoints and turnpoints didn't work anymore
fixes a bug where the JavaFX-based map didn't initialize on Java 7
fixes a bug where printing for the JavaFX-based map view under Java 8 was not working (under Java 7 there is no print support for JavaFX)
fixes a bug where dragging and modifying positions in the position list leads to invalid routes, tracks, waypoint lists
fixes a bug where the selection on the map was not updated when dragging and modifying positions in the position list
fixes a bug where the display of the waypoint description on the map was always disabled