Queue kbd shortcuts

[rhippler]

I was browsing a RSS feed and a dialog popped up asking if I wanted to 'mark watched' I did and it marked the highlighted show as watched. my fingers were around the enter/ok key when this happened. does anybody know the key sequence for this? I have tried every conceivable one around that key and nothing brings this dialog up again. Also is there a way to play all unwatched shows in a feed? I find it rather tedious to go through dialogs that pop up for each show separately especially when they are 2-3 minutes apiece. TIA