This patch fixes two issues that prevented the application font related tests
of tst_QFontDatabase from passing:
* The code for creating the font descriptor after the registration of an app font
with file name using CTFontDescriptorCreateWithAttributes must create a dictionary
with kCTFontURLAttribute as key and the CFURLRef pointing to the on-disk file as
value. Unfortunately the code mixed up keys and values in the dictionary.
* Registration of app fonts within QFontDatabase itself on Windows and Fontconfig
platforms works by QFontDatabase calling addApplicationFont on the platform db
after calling populateFontDatabase(). It assumes that addApplicationFont on the
platform db is capable of registering the font right away. This part was also
missing from the Mac implementation and this patch implements it by moving the
common registration code from a CTFontDescriptorRef out into a separate method,
called from populateFontDatabase() as well as addApplicationFont().
Task-number: QTBUG-23062
Change-Id: Ide5e6bf277d99f3cab50ee0d4631cc3fba6d0d45
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>
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