[Kst] [Bug 140520] Font size for newly created plot is incorrect

[Barth Netterfield]

I understand and agree with your point that any automagic new-plot generation 
should use a good guess for font size.

The situations that the wizard and command line face (simultaneous creation of 
multiple plots) are different than the other situations (creation of 1 plot, 
sometimes in the presence of existing plots) so whatever we do has to deal 
with that.

In the mean time, I like the pre-fix situation better than the current 
situation.