[Feature] breakdown PWDEBUG flags

[idoros]

I was using PWDEBUG in order to preserve the developer tools settings as part of my workflow process. Over time the PWDEBUG introduced more setting, like the automatic opening of the new inspector and canceling the timeout.

The main thing that broke my flow was the x-pw-glass element injected by the inspector. The element cannot be toggled off even while the inspector is closed and causes my image snapshots to fail (I think it would be nice to somehow hide the x-pw-glass element from snapshots).

I wonder if those behaviors could be broken down into individuals environment variables?

[pavelfeldman]

Makes sense. Note that the cancel timeout behavior has always been there.