InputCommon: Introducing the "Dynamic Input Texture". Configuration links an emulated input action to an image based on what host key is defined for that emulated input. Specific regions are called out in configuration that mark where to replace an input button with a host key image.

Source/Core/VideoCommon/TextureCacheBase.cpp

@@ -137,6 +137,17 @@ void TextureCacheBase::Invalidate()
   texture_pool.clear();
 }
 
+void TextureCacheBase::ForceReload()
+{
+  Invalidate();
+
+  // Clear all current hires textures, they are invalid
+  HiresTexture::Clear();
+
+  // Load fresh
+  HiresTexture::Update();
+}
+
 void TextureCacheBase::OnConfigChanged(const VideoConfig& config)
 {
   if (config.bHiresTextures != backup_config.hires_textures ||