client: fix no playlist scrollbar
client: fix no playlist scrollbar

when list exceeds pane height. See #33

neynah/groovebasin,gorlug/groovebasin,melissanoelle/groovebasin,Qbuer/groovebasin,gorlug/groovebasin,neynah/groovebasin,sammcj/groovebasin,gorlug/groovebasin,CalebMorris/groovebasin,emersion/groovebasin,andrewrk/groovebasin,dwrensha/groovebasin,melissanoelle/groovebasin,sammcj/groovebasin,Qbuer/groovebasin,dwrensha/groovebasin,melissanoelle/groovebasin,dwrensha/groovebasin,dwrensha/groovebasin,sammcj/groovebasin,CalebMorris/groovebasin,emersion/groovebasin,neynah/groovebasin,Qbuer/groovebasin,andrewrk/groovebasin,emersion/groovebasin,CalebMorris/groovebasin,andrewrk/groovebasin