Analysis: Pap - done (30m) [[BR]] Review: 2 by Tanya - 15m "There can be different bottom panels." is incorrect. There will be only one bottom panel providing extension points for bottom panel elements. [[BR]] Analysis 2: Pap - done (7m) [[BR]] Review 2: 3 by Pav[[BR]] Design: Peko - done 20m [[BR]] Review: 3.5 by Pap. The design is good enough.[[BR]] Implementation: Peko - done 1h[[BR]] Testing:[[BR]]