[Audacity-quality] Missing help files message is not user friendly

[Steve t. F. <ste...@gm...>]

Current error message:
----------------------------------
Failed to open URI "file:/usr/local/share/audacity/help/manual/quick_help.html".

Error when getting information for file
'/usr/local/share/audacity/help/manual/quick_help.html': No such file
or directory.
----------------------------------

Perhaps it  would be better to say something like:

----------------------------------
Help files not found at:
"file:/usr/local/share/audacity/help/manual/quick_help.html".

The Audacity manual is not installed,
To view the manual online, click <HERE>
----------------------------------

Also, the "How to get help" screen says:

These are our support methods:
"Quick Help (should be installed locally, <Internet version if it isn't>)"

but that is not true for Linux or the Zip version.
Perhaps better to say something like:

These are our support methods:
Quick Help (if manual is installed, <Internet version if it isn't>)

Steve