zoneconf: reduce the width of inputs for vlanid

zoneconf: reduce the width of inputs for vlanid

The inputs for the vlanids are overlapping the borders of their cells (using a recent Firefox on Linux Mint, Android or Windows 7). This patch fixes this by limiting the width to a fixed value.

Signed-off-by: Alex Koch <ipfire@starkstromkonsument.de>
Signed-off-by: Alex Koch <ipfire@starkstromkonsument.de>
Acked-by: Michael Tremer <michael.tremer@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>