MediaInfo: Enable image formats.
Update coverity.bat.

Redirect stdout to stderr and both to NUL for the tar check.
Update Unrar to 5.0.8.
MediaFormats: Add an abbreviated extension list to the Media files and Audio files filters when hide extensions is disabled.

This prevents an otherwise huge list from being added to the filter name.
MainFrm: Immediately switch to the normal preset when Esc is pressed when the caption is hidden.
Revert "Call ToggleD3DFullscreen from GraphThread if it is active."

This reverts commit f6c1126aeff2f00e7e45427efaa7cb998ec8f55a.
MainFrm: Move creation/destruction of CFullscreenWnd to the Main Thread.