Cannot use ENTER to open device menu

[davkean]

Repro:

1. Press TAB until Show Hidden Icons has focus
2. Use the arrow keys to navigate to Audio Switcher
3. Press SPACE

Expected: For the device menu to open

Actual: Nothing

[davkean]

Notice that the other icons (sound, network, solve pc issues, etc) all activate on pressing SPACE and ENTER.

[davkean]

Debugging into this - SPACE and context menu key now work and you can use them to activate (both are treated as "mouse ups".

It looks like ENTER is sending two mouse ups causing us to open and then immediately dismiss the device context menu.