[FR]: Make "Enter" the default shortcut for opening an article

[larsen0815]

Brief description of the feature request

I have installed the Lite variant and pressing Enter on a selected article seems to do nothing. I then set the keyboard shortcut for "Open in external browser" to Enter, so this fixes it for me. Don't know if this is any different in the Non-Lite variant.

However, I think this keyboard shortcut should be the default.