Corrected IPv6 Address Configuration Mode tooltip

Corrected this tooltip to reflect the actual name of the option:
'No options specified' instead of the incorrect: 'No option selected'.
Also made minor adjustments for grammar.

Change-Id: I0f89390cf0dbfdd3775fc9985b2dd77512593ac8
Closes-Bug: 1394581
Imported Translations from Transifex

For more information about this automatic import see:
https://wiki.openstack.org/wiki/Translations/Infrastructure

Change-Id: I2983cf9fd07ed76e3b9962367de74ca63900d38a
Merge "Corrected IPv6 Address Configuration Mode tooltip"
Merge "Imported Translations from Transifex"