wddm/win8.x: fix DisplayOnly+2D, some new command submission cleanup and fixes

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@50898 cfe28804-0f27-0410-a406-dd0f0b0b656f
remove changes that break up log and error strings, introduced in 92972

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@50899 cfe28804-0f27-0410-a406-dd0f0b0b656f
Additions/common/VBoxVideo: fix a return value.

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@50900 cfe28804-0f27-0410-a406-dd0f0b0b656f
Additions/linux/drm: adjust driver to use main memory graphics heap interface.

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@50901 cfe28804-0f27-0410-a406-dd0f0b0b656f
Additions/linux/drm: add host mouse cursor support to the kernel video driver.

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@50902 cfe28804-0f27-0410-a406-dd0f0b0b656f
added prefix X509 into all error definitions related to X509

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@50903 cfe28804-0f27-0410-a406-dd0f0b0b656f
added prefix X509 into all error definitions related to X509

git-svn-id: http://www.virtualbox.org/svn/vbox/trunk@50904 cfe28804-0f27-0410-a406-dd0f0b0b656f