Per-torrent download limits are often lost

[Roman Timushev]

1. If you set download speed limit for torrent using "Settings" tab in the bottom panel, the limit will not be applied. When clicking on another torrent and back, the displayed limit returns to -1
   
2. If you try set the limit using context menu, enter value in popup window and press "OK" buttom, the limit will not be applied either

I found the working way to set this limit: the same as in (2), but before pressing "OK" button, press Enter key in the input field. Then the limit will be applied. However, it won't be added to context menu, and won't be shown next time you enter this dialog.

Ubuntu 8.04, Deluge 1.0.3. Daemon + gtkui mode.