Support hitting [Enter] after entering a password on a connection on mobile devices

This is a minor nit, but the behavior is inconsistent between desktop and mobile versions of RDM.

When using RDM on the iPad, typing the password on the internal (on-screen) or external paired keyboard for a connection and hitting [Enter] does not launch the connection like it does on desktop.

To launch the connection after entering the password, you have to reach up/mouse up and tap [Ok] in the upper-right corner.

It's a bit of an annoyance for every connection to have to switch the context and input method.