Enable remote access on VNC installations

* This fix bnc#893501 as soon as bnc#893965 is fixed. Verified with yast/yast-yast2#289
* Adds new string to i18n "Enabling remote administration"
Don't. https://github.com/yast/yast-ruby-bindings/commit/fa8c4398da43bbd1f062eb4ab18cfa06ccaeacaf