Well there used to be a good setup in the program for the shortcut keys list, but even the one in the online help area isn't complete anymore so I'm not sure if they have added one for this or not with the new version. I don't "think" they did, but that doesn't mean they didn't lol.
The current list of what they have isn't for the new version as the current one was done in Sept. 2013 and that one isn't complete either. Doesn't even show the F4 shortcut on the list so I'm sure it's missing others too. You can find that list here if you want to look it over:
http://www.coffeecup.com/help/articles/ … shortcuts/
The descriptions says it's a complete list, but it's definitely not complete. Maybe the CC guys will see this and check that over to get it updated
Having said all that, there has never been a key to upload the "current open" page that you're working on, it has always only been the highlighted page or pages as it can do more than one at a time. Would be great to see this feature implemented as it's been asked for before a good handful of times. I think people give up after a couple of years of trying to get a feature when it's still not added so I haven't seen anyone ask for it for a while, but it was definitely something asked for before.
I would suggest that you put it into the suggestions forum for the HTML editor and put your 2 cents in so they know people are still interested in that feature. Good luck with it and sorry I couldn't give you better news on it.