AESinkPULSE: Fix linear volume to do the same as other PA apps
AESinkPULSE: Don't poll for external volume change
[Make] - don't install .git directories
AESinkPULSE: Register Callbacks as late as possible
Merge pull request #5231 from fritsch/pa-volume-fix

AESinkPULSE: Fix linear volume to do the same as other PA apps
Merge pull request #5243 from Memphiz/dontinstallgit

[Make] - don't install .git directories
[3D] default preferred stereoscopic mode to "auto"
[3D] use ENUMs for playback mode
[3D] make "mono/2D" a default playback mode instead of a preferred stereo mode (it's no real stereomode)

Also removes the mode "none" from the list of preferred modes, and moves it to the playback modes.
[3D] hide stereomode of movie in ask dialog if preferred mode is sames as movie mode
[3D] show "same as movie" as preferred mode label in case of autodetection instead of the detected mode
[language] cleanup and improve stereoscopic labels

- removes duplicates
- makes wording more userfriendly
[3D] handle stereoscopic mode of videos in mixed playlists
[3D] only change stereomode in playlists if not manually adjusted/changed by the user