[Audacity-quality] Default location of preferences has changed on Linux

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

The default location for preferences on Linux is documented as:
~/.audacity-data/
which is where it has been for many years.

Testing a fresh debug installation of Audacity 2.1.3 alpha on Debian
Stable, the default location is now:
~/.Audacity-data/

Note that the default Linux file system is case sensitive.

Steve