Bugfixes and minor changes:

* Fix crash on SFTP download resume caused by uninitialized variable in PuTTY code
* Properly refresh remote directory after chmod if synchronized browsing is enabled
* Fix unediting locale files in file editing dialog
* Fix regression with custom post-login commands on servers supporting MLSD
* Trigger refresh of transfer progress bars after resizing queue
* Several small fixes to minimize to tray functionality