SOS-1820 update groups' theme and remove so-welcome-theme through upgrade
SOS-1820 SF
LRDCOM-6291 Update SO Screenshots
SOS-1820 remove UpgradeGroup. Should be split into upgradeLayoutSet and upgradeLayout
SOS-1820 Add UpgradeLayout, UpgradeLayoutSet, UpgradeTheme
SOS-1820 Sort
SOS-1820 SF