[omxplayer] remove duplicate log messages
[dvd/omxplayer] actually use IsCaching()
[md5] have getDigest() return a std::string to simplify the caller code
list enabled repositories in enabled add-ons
Merge pull request #3957 from Jalle19/minor-cleanups

Remove some unused code, reuse existing methods, and remove duplicate logging
Merge pull request #4937 from MartijnKaijser/enabled_repos

list enabled repositories in enabled add-ons
changed: Remove display of XBOX dvd icon unused code

This would display a XBOX dvd icon if DefaultXboxDVD.png still existed
which doesnt anymore,
change: remove unused xbox overlay support

This is legacy from the xbox days. highly unlikely to ever be used again

ICON_OVERLAY_TRAINED
ICON_OVERLAY_HAS_TRAINER

and removes references to respective unused textures

OverlayTrained.png
OverlayHasTrainer.png
[videodb] change the DateAdded sort for tvshows to use MAX(DateAdded) for episodes of that show.
[tvshows] add DateAdded sort order for tvshow view listings
[addons] fix crash when launching an add-on installed locally (i.e. not from a repo) from the addon info dialog
[addons] set Addon.Installed if m_localAddon is available, not if m_addon is available (as that's addons in a repository)
[guilib] remove dead code
Merge pull request #5009 from jmarshallnz/md5_digest

[md5] have getDigest() return a std::string to simplify the caller code
Merge pull request #5016 from jmarshallnz/dateadded

Switch 'dateadded' for tvshows to MAX(episodes.dateAdded)
remove all "using namespace" from header files
Merge pull request #4532 from Jalle19/header-std-namespace

Don't import namespaces header files
[settings] pass the current video settings to SaveFileState job
[cosmetics] always create the save file state job on the heap
[settings] use SaveFileState() instead of SaveCurrentFileSettings()