Update field type in database when user requests to link/unlink selectbox.
Remove unnecessary flag ($linked).
Add warning message to user when toggling multiple selection to 'Not Allowed'.
Merge branch 'master' into change-sql-field-type-when-unlinking-selectbox
Add test case for toggling multiple selections in selectbox config.
Add test case to ensure datatype in the database has changed when the
linking of selectbox changes.
Seperate test case into two seperate ones.
Change the test url to what it should be.
Remove double click of element in test.
Change what text is being waited on when screen in loading.
Remove double click of element.
Merge 77730b3a92c91731b01b43949375ece3b8bd9bbf into 147ec47c195f9752d5d9ede28d5e17fa0f2af379