Read delete permission from server response
Remove buttons from the local catalogue search view and add them to the widget wallet
Make selenium test code handle the new widget wallet
Return error 403 when trying to modify read only preferences
Check the mashup parser code handles correctly the readonly, hidden and forced values of operator preferences
Add operator preferences parametrization to the tests
Fix version comparison in catalogue search engine

Signed-off-by: Álvaro Arranz <aarranz@conwet.com>