Application unfocused if returning from lock screen with password enabled

[Michael Sheldon]

If a password is enabled (instead of a pin or swipe unlock) then an application loses focus when returning from the lock screen. While the application can still be interacted with, it isn't able to accept input due to not being considered the currently focused application by the input framework.

Steps to reproduce:

 1) Set a password in System Settings -> Security & Privacy -> Lock phone -> Lock security

 2) Return to the dash

 3) Lock the phone

 4) Unlock the phone and enter password

 5) Tap search icon

Expected result:

 Application should by focused and the keyboard and input cursor should appear

Actual result:

 Search box gets focus within the application but the application itself doesn't have focus, so the keyboard and cursor don't appear.

 Viewing the unity8-dash.log shows the last entry as "UbuntuWindow::handleSurfaceFocusChange(focused=false)" upon returning to the application from the lock screen.

 The user then has to swipe right to the application switcher and re-enter the app for it to regain focus.