Description of problem:

When editing a form using in the "Add fields by origin" tab, we can select a field and click on the pencil icon and the properties pane will be displayed. We can close it unless we select the "Form data origin" tab. If we select it, we can click to close the properties pane, but it will never be closed.

Version-Release number of selected component (if applicable):
n/a

How reproducible:
Always

Steps to Reproduce:
1. Enter the form modeler;
2. Select "Add fields by origin" tab;
3. Select some field and the pencil icon and the properties pane should be displayed;
4. Select the "Form data origin" tab;
5. Try to close the properties pane.

Actual results:
The click will be ignored and the pane will not be closed.

Expected results:
The pane should be closed.

Additional info:
If we move to other tab than "Form data origin" tab it works.