Implement "Skip" ubershader mode

Skip ubershader mode works the same as hybrid ubershaders in that the
shaders are compiled asynchronously. However, instead of using the
ubershader to draw the object, it skips it entirely until the
specialized shader is made available.

This mode will likely result in broken effects where a game creates an
EFB copy, and does not redraw it every frame. Therefore, it is not a
recommended option, however, it may result in better performance on
low-end systems.

Source/Core/DolphinQt2/Config/Graphics/GraphicsRadio.cpp

@@ -0,0 +1,24 @@
+// Copyright 2018 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "DolphinQt2/Config/Graphics/GraphicsRadio.h"
+
+#include "Common/Config/Config.h"
+#include "DolphinQt2/Settings.h"
+
+GraphicsRadioInt::GraphicsRadioInt(const QString& label, const Config::ConfigInfo<int>& setting,
+                                   int value)
+    : QRadioButton(label), m_setting(setting), m_value(value)
+{
+  setChecked(Config::Get(m_setting) == m_value);
+  connect(this, &QRadioButton::toggled, this, &GraphicsRadioInt::Update);
+}
+
+void GraphicsRadioInt::Update()
+{
+  if (!isChecked())
+    return;
+
+  Config::SetBaseOrCurrent(m_setting, m_value);
+}