Calling applicationName() in the destructor of a global static (e.g.
via QLockFile) was working when calling setApplicationName explicitly
but otherwise it would suddenly return an empty string.
This led to inconsistencies, the application name switching from
non-empty to empty at saving-on-destruction time.
There was already a global static, used when setting the app name
explicitly before construction. Use it now to store the app name
in all cases (explicitly set, or fallback).
Change-Id: I71d3a0c40158f8bfd022c385b198346a2594b1cb
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
6c973dee2c