webadmin: fixed misaligned arrow icon in footer bar

PatternFly patch caused misaligned arrow icon in footer bar.
Fixed.

Change-Id: I5b11c01653749cceef6c89498bfda9540cf3867b
Bug-Url: https://bugzilla.redhat.com/1095114
Signed-off-by: Greg Sheremeta <gshereme@redhat.com>