[Wien] Enable to plot more than first points in Analysis

[Luc Fruchter]

Hi,

Trying to plot the energy in w2web from a case.scf file, the plot only 
shows the first 4 iterations values, although all ~ 30 energy values of 
this file are displayed in the list.

I do not have this problem on other *.scf files, and the only pecularity 
that I can see with this file, is that it is a large one, due to 154 atoms.

- thanks for your help