IE11: A moving of an element causes that this element looses a focus

Description of problem:
When I move an element which has been activated, Quick Shape Menu disappears and Properties Bar contains wrong properties.

Version-Release number of selected component (if applicable):
6.0.2 CR1
6.0.2 ER2 is not affected by this issue

How reproducible:
Use IE11 and Windows 8.1 (not tested with Win7, Windows Server 2012 -> results will be added later)

Steps to Reproduce:
1. Activate any element in process
2. Drag this element in process (mouse down)
3. Drop this element at the different position (mouse up)

Actual results:
Step 1: The element is bounded by a rectangle with icons (Quick Shape Menu) and Properties Bar contains properties of the element.

Step3: The element is not bounded (Quick Shape Menu is missing) and Properties Bar contains properties of the process

Expected results:
Designer is not changed (Properties Bar, presence of Quick Shape Menu), just a location of element is different. Same behaviour as for FF browser.

Step3: The element is bounded by a rectangle with icons (Quick Shape Menu) and Properties Bar contains properties of the element.

Additional info:
I think that problem has come this commit https://github.com/droolsjbpm/jbpm-designer/commit/8a2e7aadf78ad5825c64715de0fc6e5995571e0d which does not rich an expected behaviour. It was in 6.0.2 ER3.

My opinion is that:

• removing of registration of ORYX.CONFIG.EVENT_MOUSEUP
• or changing of condition from isIE to Object.hasOwnProperty.call(window, "ActiveXObject") && !window.ActiveXObject
  may cause this problem.

By the way, the automatic test suite of Designer is broken now. An activation of an element failed (nothing happen). Same test works fine with ER2.