Clicking add class with empty name crashes program

[lukaswozniak]

Clicking add class on below screen would cause the program to crash

[jveitchmichaelis]

I can't replicate this one. The add class function should do nothing if the class string is empty.

Can you list some exact steps to trigger this? (if you're compiling from scratch, you could also compile in debug mode and see what's causing it)

[lukaswozniak]

It only happened once to me. I will try to reproduce later.