backports: When upgrading from older version, assumed requested

- This helps the case where an user installs FreedomBox on Buster and then after
finishing the first boot wizard and before repositories have been setup,
upgrades to latest FreedomBox version.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/upgrades/__init__.py

@@ -18,7 +18,7 @@ from plinth import cfg, glib, menu
 
 from .manifest import backup  # noqa, pylint: disable=unused-import
 
-version = 6
+version = 7
 
 is_essential = True
 
@@ -119,6 +119,11 @@ def setup(helper, old_version=None):
     # increment.
     helper.call('post', actions.superuser_run, 'upgrades', ['setup'])
 
+    # When upgrading from a version without first boot wizard for backports,
+    # assume backports have been requested.
+    if old_version and old_version < 7:
+        set_backports_requested(can_activate_backports())
+
     # Try to setup apt repositories, if needed, if possible, on first install
     # and on version increment.
     helper.call('post', setup_repositories, None)