move feature

[eSlider]

When you move a feature in Mapbender 3.0.5.1 (per digitizer) you have to to click
the elemet another time to open the feature dialog.
A new option to digitizer Element like:

• openDialogAfterElemetMoved
  OR
• saveFeatureAfterElementMoved
  would be nice.

Recreated from:
mapbender/mapbender#361

Author:
@marmancs