Smart quick search and most visited directories

[ais04]

1) Right now you can use "Beggining" option or not. TC could automatically disable this option if there aren't any results.
For example, file list
abc
bcd
cde

if you set "Beggining" and search for "e" it will show cde file, because there aren't files which begin with "e".

2) If quick search text box is empty you could close it by press backspace.

3) Something like auto directory hotlist. TC could show most visited directories which aren't in hotlist. So user don't need to analyze this information himself.