Set max download speed
Set max upload speed
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Start all
Stop all
Pause ((but Remove if possible))
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Paste torrent url
Open
New (maybe remove this one? As far as i understand it is not common action, users prefer downloading then uploading. IMO it would be enough if this icon is in main window/main toolbar)
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Configure Ktorrent
Show/hide Ktorrent (when main window is showed then "hide", when hided "show". Not both)
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Quit