select moved text after drag-and-drop

Author: DevCharly

richtextfx/src/main/java/org/fxmisc/richtext/model/EditActions.java

@@ -186,6 +186,9 @@ default void moveSelectedText(int pos) {
                 pos -= sel.getLength();
             deleteText(sel);
             insert(pos, text);
+
+            // select moved text
+            selectRange(pos, pos + text.length());
         }
     }
 }