[Users] Search window input persistence

[Ethy H. Brito]

Hi

I have two claws-mail setups in two different machines.
In one machine, if I write anything in the search window 
(from/to/subj/tag for instance) and change folders the input *is not* erased.
In the other machine it is erased every time I change folders.

Where is this behavior controlled?

Regards

Ethy