o Mirror/flavour settings now in firmware section
o Proper locking layer to prevent parallel invokes
o Can reattach to running background update
o Can even GUI-attach to cron job or console update

(cherry picked from commit 70998ed9)
(cherry picked from commit 2e10248c)
(cherry picked from commit 5a3a3a84)
(cherry picked from commit d2471552)
(cherry picked from commit 96be50d4)
(cherry picked from commit 9f7e1b89)
(cherry picked from commit 2fe4dce1)
(cherry picked from commit 419d6d72)
(cherry picked from commit eb7a9a31)
(cherry picked from commit 4dde2392)
(cherry picked from commit 951a2984)
(cherry picked from commit b891dc9f)
(cherry picked from commit d46366d2)
(cherry picked from commit 3201c221)