VideoCommon: when loading graphics mods from saved settings, if the g…

…raphics mod in question no longer exists, skip it so it is removed on next save

Source/Core/VideoCommon/GraphicsModSystem/Config/GraphicsModGroup.cpp

@@ -81,6 +81,10 @@ void GraphicsModGroupConfig::Load()
           graphics_mod->DeserializeFromProfile(mod_json_obj);
 
           auto mod_full_path = graphics_mod->GetAbsolutePath();
+          if (!File::Exists(mod_full_path))
+          {
+            continue;
+          }
           known_paths.insert(std::move(mod_full_path));
           m_graphics_mods.push_back(*graphics_mod);
         }