update to javafx 13.02 (#5921)

* Fixes making paths of linked files relative (web urls will not be touched anymore) (#5879)

* Fixes #5861
Description:
- Cleanup entries: "Make paths of linked files relative (if possible)" broke web URLs and resulted in various other issues subsequently. This PR fixes this issue.
It has been tested for local files and web urls.

* changelog updated

* refactoring: use existing method isOnlineLink() for checking whether a file link is an online link; improving isOnlineLink()

* Replace link to Workspace set-up with new one (#5896)

As the current link just pointed to a page with another link, I'd propose to directly put that second link.

* update to 13.0.2

Co-authored-by: systemoperator <3658393+systemoperator@users.noreply.github.com>
Co-authored-by: Thomas F. Duellmann <duelle@users.noreply.github.com>

build.gradle

@@ -102,7 +102,7 @@ configurations {
 }
 
 javafx {
-    version = "13.0.1"
+    version = "13.0.2"
     modules = [ 'javafx.controls', 'javafx.fxml', 'javafx.web', 'javafx.swing' ]
 }