Fixed [Abort] button handling in Disks Activation dialog

- bnc#893281
Changes and version
Merge pull request #233 from kobliha/fix-abort-button-behavior-in-disks-activation

Fixed [Abort] button handling in Disks Activation dialog
Enable remote access on VNC installations

 * Will fix bnc#893501 as soon as bnc#893965 is fixed (verified with the fix
   to bnc#893965 available at https://github.com/yast/yast-yast2/pull/289)
 * Adds new string to i18n "Enabling remote administration"
Version and changelog updates