only show board resize handle on first ply
only show board resize handle on first ply

luanlv/lila,luanlv/lila,arex1337/lila,arex1337/lila,luanlv/lila,arex1337/lila,arex1337/lila,luanlv/lila,arex1337/lila,arex1337/lila,arex1337/lila,luanlv/lila,luanlv/lila,luanlv/lila