Allow for foto taking from lock screen
This goes into the wider area of what the lock screen should include but since we already have consensus of moving the top-bar and quick settings there let's think a bit more ahead:
It would be great if taking a foto would be quick. Like pick up the phone, pull up from a corner (e.g. android has a camera icon in the lower right corner) and take a photo. No photo browsing from there just taking a foto / filming.
/cc for design ideas / concepts @bertob @snwh and @merge @dcz since this will affect the camera app / implementation too