showj: table --> gallery switch renders wrong column

[azazellochg]

Bug or feature? :)
To reproduce:

1. open a setofmics after movie alignment -> shift plots are rendered by default in table mode
2. set rendering to mic filenames, switch off rendering of shift plots
3. switch to gallery view --> you get shift plots not mics!

Or, display a set of CTFs with psd and plot shift rendered, render only mics, switch to gallery --> you get psd images!

My guess is that in gallery mode the first (rendered by default) column gets always displayed.