basis.ui.table: make header/footer cells configurable as usual Node instance
basis.ui.table: make header/footer cells configurable as usual Node instance

fateevv/basisjs,smelukov/basisjs,tyanas/basisjs,tyanas/basisjs,basisjs/basisjs,basisjs/basisjs,basisjs/basisjs,istrel/basisjs,smelukov/basisjs,istrel/basisjs,fateevv/basisjs,fateevv/basisjs,istrel/basisjs,tyanas/basisjs,smelukov/basisjs