Easy improvement to QVR Client login screen

[dchang0]

Hi--

This is a really easy improvement to the QVR Client login screen: pressing <enter> submits the login form, and <tab> key cycles through all the checkboxes and the Login button. In other words, make the QVR Client screen operable without a mouse, just a keyboard.

As it stands now, one has to use the mouse to click the Login button. We have our security monitor set up with a keyboard in a small, cramped space and the mouse is attached but hard to reach and even harder to move around.

We are running QVR Client 2.2.1 (170220) on an old Mac.

Thanks!