For select fields, with predefined values in the corresponding JSON
schema, when a value is saved other than the default, the field will
be empty after saving in the Device config editor. This happens only,
in combination of the lib select2.  The cause of the issue is, that
the jsonschema-ui.js version does use a deprecated way to initialize
select2 inputs. This commit will fix this issue by updating the way of
initializing the inputs.

Fixes #910

Signed-off-by: Konrad Kreitmair <[email protected]>

…910

This addresses the problem, that the drop-down for Configuration Menu
and Object Properties are not shown anymore in the device config
editor, if a configuration section is saved, which has in its JSON
schema definition a property with type array and should have unique
items. The cause of the problem is a call to super, when there is no
super. This commit will fix this issue by removing the call to super,
because it is not needed in this special case neither in all other
cases.

Fixes #910

Signed-off-by: Konrad Kreitmair <[email protected]>