New HIG draft for column-based navigation

[Thomas Pfeiffer]

Hi everyone,
I just wrote a draft for an HIG for our column-based navigation pattern (the 
one used in Add Ons). You can find it here:
http://community.kde.org/Plasma/Active/Development/ActiveHIG/ColumnViews
I plan to use a different HIG for flat (one-level) categories because in that 
case, the whole rest of the screen is dedicated to the items in each category 
instead of just one column (and I assume a different component is used as 
well).
Comments welcome as always!

@Marco: If there is a straightforward way (aka Plasma Component) to implement 
this available, can you please put in the minimal code to implement it at the 
code section (or send me the snippet and I'll put it in)?

Thanks,
Thomas