[confluence] change buttons to edit controls (see #4613)
[rbp/omxplayer] Reset display region when video stream properties change

Currently when video stream properties change, e.g. when user switches to next or previous Live TV channel, and has the same frame width and height, the COMXVideo::SetVideoRect() method is not called, causing the video to play back with default source and destination rectangles, not respecting the user-defined zoom settings.

This commit fixes the issue.
[cosmetic] drop unused include
[fonts] drop reading of unicode='true' attribute as we assumed it was true anyway
ActiveAE: allow sinks to return planar formats
[EPG] Do *Persist*() calls on a copy of m_epgs

We can get in a situation where PersistAll() and PersistTables() are
running simutaneously, leading to memory corruption.
[EPG] Make sure we catch requests to update during update.
[cleanup] drop unused code blocks in contextmenu from ancient skins.

Skins for 14.X should use a single background image (id 999) with border.
and must have a grouplist with id 996 for the context menu.
[cosmetic] change name of define to better reflect what it's for (old python guilib stuff)
[guilib] remove backward compatibility of converting edit controls to buttons.

For v14 ensure the following controls are edit controls:

SmartPlaylistEditor.xml:
 id 12, name of smart playlist

SmartPlaylistRule.xml:
 id 17, value of rule

DialogMediaSource.xml:
 id 12, name of media source

DialogNetworkSetup.xml:
 id 11, server address
 id 13, port
 id 14, username
 id 15, password
 id 16, remote path
[addons] adds GetDependencyVersion() to CAddon - used in place of GetXbmcApiVersionDependency
[guilib] adds APIVersion() to CSkin to determine which API version the skin wants.
[guilib] drop the separate default for the aspect ratio inside containers. It previously defaulted to keep unless the image was constant (not infoimage) where it defaulted to stretch. It now defaults to stretch like all images.
[guilib] remove inconsistent positioning of labels inside containers. <left> now mean left
[guilib] bump xbmc skin version to 5.1.0, still bw compat to 5.0.0
[cosmetic] drop unused function
[cosmetic] drop function definitions that no longer exist
[PVR] Don't disable PVR clients not in AddonDB

AddonDB is not a reliable source for testing existence of an addon, use
AddonManager instead and tag clients as "known" in PVRDB.
[PVR] Drop unused AddonDB instance member.
[PVR][ADDONS] Drop unneeded PVRAddon special case