Folder tree suggestions

[Dreamer]

- "single click to expand f. t." doesn't work at all sometimes, try to select any folder and click it - it doesn't work, if you click other - not selected folder, it works, I think it's some conflict with "single click to rename" feature

- "single click to rename" feature is really annoying, one of reasons why I don't use folder tree often, there could be an option to disable it, not just because of conflict above, there should be maybe radio buttons for "single click to rename" and "single click to expand (collapse) f. t."

- "single click to expand f. t." is very slow - 1.3 - 1.8 sec., it looks that all pictures in that folder are loaded first

- "single click to expand f. t." is incomplete without "single click to collapse f. t.", I have to use those small [+] / [-] symbols, it is very annoying