add and delete Category at Project tab
Child form header format
Merge pull request #498 from olga-jane/oobi_child_header

Child form header format
Merge pull request #495 from olga-jane/sidorov_CategoryAddNewRow

add and delete Category at Project tab
Set mask via SetMask control extension method
Merge pull request #500 from olga-jane/oobi_controls

Set mask via SetMask control extension method
comments. remove unnecessary code
IsEditMode approach, deactivated

IsEditMode added (to pipes yet)
deactivated will react on property changes
Merge pull request #502 from olga-jane/oobi_refactoring

Refactoring: read-only mode, unnecessary code
use original color when not required
Merge pull request #503 from olga-jane/oobi_refactoring

use original color when not required
Merge pull request #504 from olga-jane/master

Update O_Morozova