alt-command-p should publish focused file, whether that's in the editor or file browser

When a text-editing window has focus, alt-command-p should publish that file rather than the file currently selected in the file browser.

So let's say we go to the file browser in a site that is linked to an FTP server. We open three files and start working with them, and the last file we open maintains the file browser focus.

Now let's say we start switching between the open files using tabs. We find the problem in our code and make changes to the *first* file we opened, which, although focused in the editor, is not focused in the file browser. In my opinion, whatever that is worth, the file focused in the editor should be the one pushed to the FTP server.

Going a step further, I wouldn't mind seeing the file browser's focus match the file editor's focus, so that as you switch between tabs, the relevant file is highlighted in the file browser. When I tab to file-a, file-a is also selected in the browser. But that's a bit more drastic, and not necessary to addressing the issue of sending only the focused file to FTP.

Also: Hi there. Nice work.