Bug 35356: Show SMS labels only when data exists

Bug 35356: Show SMS labels only when data exists

To test:
APPLY PATCH
1. Set SMSSendDriver = Email
2. Admin > SMS cellular providers, have at least 1.
3. Go to the members/moremember.pl
4. If the patron has no SMSnumber or SMS provider then niether of the labels should appear.
5. Add both a SMSnumber and SMS provider, make sure the data appears correctly on members/moremember.pl.

Signed-off-by: Andrew Fuerste Henry <andrewfh@dubcolib.org>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>