Polish, fix and otherwise improve the video plugin configuration dialog:

- Add some info about a backend's feature set (MSAA, Real XFB, EFB to RAM, ..) to VideoConfig
- Gray out options if they aren't supported by the backend or if changing them doesn't affect anything (e.g. changing STC mode if STC is disabled)
- Allow signed bytes for D3D11. Not sure if this causes glitches, but it should work
- Call wxEvent.Skip() in the event function handlers, not sure if this fixes any bugs but the old code definitely caused bugs during development of this patch
- Fix a memory leak in the configuration dialog if D3D11 is used
- Other minor stuff that doesn't need to be mentioned or which I forgot

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@6450 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Plugins/Plugin_VideoDX11/Src/VertexManager.cpp

@@ -82,15 +82,7 @@ void VertexManager::DestroyDeviceObjects()
 	SAFE_RELEASE(m_indexBuffer);
 }
 
-VertexManager::VertexManager() :
-	m_indexBufferCursor(0),
-	m_vertexBufferCursor(0),
-	m_vertexDrawOffset(0),
-	m_triangleDrawIndex(0),
-	m_lineDrawIndex(0),
-	m_pointDrawIndex(0),
-	m_indexBuffer(NULL),
-	m_vertexBuffer(NULL)
+VertexManager::VertexManager()
 {
 	CreateDeviceObjects();
 }