fix #10564: graph traversal from plate run to well
allow deleting screen after deleting shared plate within
make it possible to delete wells without deleting their samples
ensure that there remains a bean named /Well
use proper constants instead of repeating strings
create test users with non-user default group
Merge pull request #1562 from bpindelski/callback-scaling

Update CmdCallbackTest to use the scaling factor
Remove Python bfpixels tests. See #11500
Only use admin status not leader status
Merge pull request #1459 from will-moore/scripts_menu_11434

Scripts menu 11434
Initial tests to delete projected image.
Replace move by delete.
Change date in header.
Do not use object.canLink for importAs.
Remove $revision.
Remove unnecessary check.
Add TODO as suggested by @mtbc.
Clarify admin01 variable name
Clean up code and remove duplicate tests.
Remove $revision.