if you chose to set date and time automatically and the default time server, then apply the settings it seems to work, hoever if going back to overview it asks again to apply/save the settings and  this makes system setting window to hang completely if you chose apply again
 i used to get just a message if the server was not reachable and could cancel/go out, this is not possible and also it says "you are not allowed to save the configuration".

so now i have this window open since 10 mins, nothing happens i also cant go back to overview, i have to manually end the system settings via ksysguard

http://s21.postimg.org/d5ow1lunb/dateandtime.jpg

Reproducible: Always

Steps to Reproduce:
1. system settings
2. regional settings, date & time
3. chose set date and time automatically, and apply changes, go back to overview, in the dialoge chose apply again. 
4. see it hangs
Actual Results:  
system settings hang

Expected Results:  
should either apply time and date automatically from the chosen server or just give out a error message like it does in kde4

http://s21.postimg.org/d5ow1lunb/dateandtime.jpg