Changed logic to get Position from Stream and not from Mixer.

Now FF and REW works with larger Buffers
Mantis #4469 Webstream Radio fix.
Mantis #4472 : Rework Recursive SlideShow to avoid repeated item.
Mantis #4473: added wikipedia support
Revert partial commit introduce in 1.2.0RC1 (solve inconstant behaviour change order in music video playlists)
Reduce font install (font can be already installed or locked by the system).
Added additional time on Reverse seeking to prevent troubles on lower speeds
Mantis #4472 : Another tweak to avoid blank screen when using recursive slideshow.
Correct item should be selected to when back after a random slideshow/recursive.
Merge remote-tracking branch 'remotes/origin/master' into BUG-4472-Random_slideshow_in_pictures_can_repeat_some_pictures_and_miss_others

Conflicts:
	mediaportal/WindowPlugins/GUIPictures/GUIPictures.cs
Fix hang when we reach end of SlideShow.
Mantis #4472: Handle going to root folder when using Date display mode.
Mantis #4472: Handle ESC selectemItem when no extension is set in MP Config.
Fix playlist Up/Down focus without break mantis #3237 (F3 / ACTION_SHOW_INFO in CoverFlow is not consistent with other layouts)
Paused SlideShow when showing EXIF Dialog.
Enable Paused option (when using Space/Remote/Topbar) in SlideShow.
Fix playing Video in Recursive SlideShow or not when 'Show Videos in Slideshows' is set to off.
Fix : Stop slideshow (when doing next) when we reach end of item list.
Fix : In some cases (_returnedFromVideoPlayback stay to true, return to previous windows is done twice, that not correct) Another fix to select correct items when doing ESC.
Fix : Start slideshow from start when using random setting.
Merge remote-tracking branch 'remotes/origin/BUG-4469-Internet_Radio_Stream_has_to_be_selected_twice'