openmicroscopy/openmicroscopy — pull request #862 by jburel (2013-03-13 12:12:35+00:00)
Title: Do not create element when screen is selected (see #10317) (rebased onto develop)

This is the same as gh-847 but rebased onto develop.

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Fix https://trac.openmicroscopy.org.uk/ome/ticket/10317

To test:
* Select a screen
* Check that the "New..." entry in the right-click menu is greyed out.