Enable use of idle or browsing connection to download files

[Tom]

It would be beneficial to download and user interaction response times if FileZilla could reuse the browsing connection (the first connection made and browsed with) to initiate file transfers, and open a second connection to resume browsing until the transfers have completed.

This arose from my use of a ssh+ftp connection which has very quick transfer times but was very slow to establish connections. With this connection policy/option available a simple two-file grab could be much quicker, and by automatically opening a connection before the user browses to the next directory you minimize overall delays experienced by the user.