[pvr] fix: duplicate parent dir item for recordings

The current integration of the parent dir item for recordings results
in a duplicate parent dir item if you add pvr://recordings as
video source. This implements a more safer way for handling the parent
dir item.
fixup: cosmetics
[release] version bump to 14.0 alpha1
Merge pull request #4316 from MartijnKaijser/14.0a1

[release] version bump to 14.0 alpha1
[language] update strings.po for missing PVR help text
Merge pull request #4313 from FernetMenta/wasapi

WASAPI: increase audio buffer for USB devices, fixes audible distortion
[osxsink] - detect digital outputs based on device name and make capable passthrough devices "AE_DEVTYPE_IEC958" for showing the passthrough options in the gui - fixes missing passthrough options on some special audio setups
[language] fix wrong string meaning. should say "Apple Remote support could not be enabled"
[language] remove unused setting descriptions
Merge pull request #4323 from MartijnKaijser/lang_fixes

Language fixes
Merge pull request #4307 from Memphiz/tvoutnonativekeyboard

[ios] - only use the native keyboard if tvout is not used (native keyboa...
Merge pull request #4320 from Memphiz/osxsinkfinddigital

[osxsink] - detect digital outputs based on device name and make capable...
Merge pull request #4277 from xhaggi/fix-recordings-parent-dir

[pvr] fix: duplicate parent dir item for recordings
[language] fix typo
[language] fix inconsistent naming of Blu-ray and improve wording of related labels
Merge pull request #4326 from da-anda/label-fixes

[language] fix inconsistent naming of Blu-ray and improve wording of related labels
[Confluence] fix usage of "next" label in mismatching contexts, which caused trouble in translations
Merge pull request #4327 from da-anda/confluence-labels

[Confluence] fix usage of "next" label in mismatching contexts
Don't enter ffmpeg dir when using external ffmpeg/libav
Fix compilation with libav 10 beta1