adding ie11 fix to vertically center labeled menu controls (currently label misaligned with down chevron in ie11).
adding ie11 fix to vertically center labeled menu controls (currently label misaligned with down chevron in ie11).

primozs/grommet,kylebyerly-hp/grommet,davrodpin/grommet,HewlettPackard/grommet,HewlettPackard/grommet,linde12/grommet,HewlettPackard/grommet,grommet/grommet,primozs/grommet,davrodpin/grommet,nickjvm/grommet,codeswan/grommet,codeswan/grommet,grommet/grommet,grommet/grommet,nickjvm/grommet