[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
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