Couple of textw fixes for master and RHEL6

[Jesse Keating]

These two patches make F12 work as expected in LUKS passphrase entry and
iSCSI discovery UI.  There may be more cases needing this, but these have bugs.

Patches are for master and RHEL6 (might need small manipulation to get them
on RHEL6).  Tested with an updates.img to F17.

-jlk