add a timer to quit the application

Fixes #385
COMP: do not use Qt macros in backported DCMTK code
Fix ctkDICOMAppWidgetTest1

Due to merge conflict the argument to the test wasn't being
passed.
Merge branch 'fix-failing-dicomapp-test'
fix name change ctkDICOMDatasetViewTest1 -> ctkDICOMItemViewTest1

Ctest was failig because the arguments referred to a test that
didn't exist anymore.
Find dcmtk helper apps for test

Fixes #387

Discovery of helper apps had been in FindDCMTK.cmake, but was omitted
from a previous refactoring.  Since FindDCMTK.cmake may be obsoleted
in the future, the test cmake code now finds the apps directly.
Merge branch 'fix-failing-dicomapp-test'
Fix color dialog test that never quits

Remove timer to avoid race condition so that test quits after
dialog is shown.

Fixes #385
Merge branch '385-color-dialog-hang'
#357 Add test that fails with current CTK

New file path should be used even if instance UID is already
in the database.
STYLE: clarify that a variable is a query

Makes the code easier to read.
WIP - don't commit - some debugging code
Merge branch '357-dicom-insert-delete-reinsert' of github.com:pieper/CTK into 357-dicom-insert-delete-reinsert