[devtools] allow cross-origin requests for qunit
We have a mix of file:// html and http:// ajax calls. Which we should
at some point fix to all be http, but. Related to #4294727.
if not rql('CWConstraintType X WHERE X name "RQLUniqueConstraint"',
ask_confirm=False):
rql('INSERT CWConstraintType X: X name "RQLUniqueConstraint"',
ask_confirm=False)