add builtin to set GUI Language
added ActivateScreensaver to builtin functions
[DVDPlayer] ffmpeg support http/https protocol options, also fix #14309.
[dvd/omxplayer] don't override NextItem/PreviousItem with chapter skipping
pvr: Pass selected item to menu hooks

Currently it is not possible to retrieve any information about the
selected item in the addon's menu hook callback. Therefore menu
hooks can only trigger actions per category, but not per item.

This patch removes this limitation by extending CallMenuHook with
an item parameter representing the type (PVR_MENUHOOK_CAT) and the
data of the currently selected item. The type PVR_MENUHOOK_UNKNOWN
indicates that no selection is available (as for settings hooks).
Add ripped CDs automatically to database
CFileItemList.assign() should keep sort information
adds disc number to cue sheets
cleanup CueDocument
[DVDPlayer/Subs] Save the subtitle number at the end of the OpenSubtitleStream() method.
Regardless of whether the subtitle has been opened successfully or not.
[GuiDialog/PlayerControls] Use CMediaSettings::Get().GetCurrentVideoSettings().m_SubtitleStream instead of g_application.m_pPlayer->GetSubtitle().
The latter one returns the maximal index if the current subtitle could not be opened. This yields wrong info about the subtitle.
[rbp/omxplayer] Add plumbing for audio GetCacheTotal
[rbp/omxplayer] OMX spec says we can transition from execute to idle
[rbp/omxplayer] Workaround for audio_mixer is not required

We have similar code in command line omxplayer, and that has never had this
workaround. I've been running with it removed for some weeks with no problems.

I believe it was working around a bug elsewhere that is no longer present.
[rbp/omxplayer] Add calls for stepping and retreiving the clock adjustment
[rbp/omxplayer] Use OMXPlaySpeed for pause/resume
[rbp/omxplayer] dispmanx now handles negative rectangles correctly so adjustment not required
[Python] Adds an optional parameter "sound" to Dialog::notification to allow a silent notification
Merge pull request #2836 from popcornmix/tidyups

[rbp/omxplayer] Some code tidy ups
Fix build after #3836