Ecosim plot overlay

[villyc]

Small feature: when using overlay on the ecosim plot it writes All, Overlay1, Overlay2, etc in the upper box on the right hand. One would expect to be able to click each of these and see the corresponding overlay highlighted, just like one can for the groups in the box below. Neat thing to add at some point

I see that if one selects a group in the lower plot, then clicks eg Overlay1, it will show it for one group, would be nice to be able to see how all groups change, overlay by overlay

[jeroens]

Build 6.0.5.5: this feature was already there, just not properly activated

[jeroens]

Build 6.0.5.5: this feature was already there, just not properly activated