Fix show less button occluding the last tile
Fix show less button occluding the last tile

Fixes https://github.com/vector-im/riot-web/issues/14450

People may have to click various combinations of 'show more' and 'show less' until it fixes itself, as their layout could be a bit weird now.
matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk,matrix-org/matrix-react-sdk