The request variable is not available when a custom template is used to render a
notification. Fix this by passing the template rendering context additional
request variable.
Closes: #1887.
Tests:
- Reduce the version number in data for 'upgrades-new-release' notification
in the plinth_storednotification table in the DB. Start FreedomBox. New release
message will appear. Go to page other than home page. The dismiss button has
next= parameter filled properly with current URL. Dismiss the notification and
notice that page URL stays the same.
Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>
