webos-system-update: submission 4

* support for updating to specific platform versions
* minor visual fixes

Signed-off-by: Simon Busch <morphis@gravedo.de>
luna-next-cardshell: submission 26

* initial but still experimental stacked cards support (needs to be activated through
  tweaks)
* fixes #505

Signed-off-by: Simon Busch <morphis@gravedo.de>
luna-next-conf: load evdevkeyboard plugin on all platforms

Signed-off-by: Simon Busch <morphis@gravedo.de>