Kostya, if you are not going back to include nested folders (Which I still argue you to still reconsider)
could you at least do me a favor and include a function in the search pane to do the following:
Example:
1. I search for folder "Ongoing" and receive the following tree:
Inbox
aBRF
Styrelse
Ongoing
2. If I then long-click on the "Ongoing" I get a menu item called "Show folders below".
3. You could then use the search function (in the background) to search for all next level items below "Ongoing" and show them in the list.
4. I could then, in the next list repeat from 2-3 again to get folders below. And so on.
This could emulate the nested structure but instead using the search function to populate the list of items.
This would not break the new existing hierarchical view design as it is using the same search engine,
somewhat modified to do more. Is this something you think could be feasible ?
//Dan Lundqvist