Description of problem:

BPMN designer ignore user settings for XML files formatting and always use 2 spaces for indentation.

How reproducible:

Set 'Indend using tabs' (or different settings then 2 spaces) in eclipse preferences - XML Files formatting, create process with BPMN designer and see generated BPMN XML.

Actual results:

Generated BPMN XML source file has always 2 spaces for indentation.

Expected results:

Generated BPMN XML source file follows the specified XML formatting settings.