Done with GUI changes for Show Compatible Contributions
Added a compatibleVersions field to properties,contrib

And the appropriate parsing of the field
Finished work on Showing only compatible contribs
Replaced compatibleVersions field with mix/maxRevision fields
Incompatible contribs are now blurred out
Merge pull request #2746 from joelmoniz/compatibleContribs

Added option to allow the user to make the contributions listing dependent on the PDE version