Shrink floater and add a "!" icon in the top left corner.

STORM-1831 Changing addRegionChangedCallback to more closely resemble the feature it replaces. This fixes the crashes reported by Whirly ;-)

If a marker file indicates that an installer has been downloaded and verified
and is ready to install, but that installer file does not exist, log it and
revert to checking for update.
Also add logging to every code path that can remove the installer explicitly,
in case the missing installer is actually being killed off by some weird
sequence of state-machine transitions.

Also, delete it when done.

Modify code to make use of the changed callback

Removed most of the previous changes.

to include region name.

Changed notification type to Alert.
Addes seconds field to notification message.

MAINT-3412 Fix Intel Iris recognizer to include optional Pro as is reported with integrated-only graphics on new MBP

be replaced with an official UUID once one has been established.