Fetch updated gamepad mappings each launch

app/settings/mappingmanager.cpp

@@ -10,10 +10,18 @@
 #define SER_GUID "guid"
 #define SER_MAPPING "mapping"
 
+MappingFetcher* MappingManager::s_MappingFetcher;
+
 MappingManager::MappingManager()
 {
     QSettings settings;
 
+    // Load updated mappings from the Internet once per Moonlight launch
+    if (s_MappingFetcher == nullptr) {
+        s_MappingFetcher = new MappingFetcher();
+        s_MappingFetcher->start();
+    }
+
     // First load existing saved mappings. This ensures the user's
     // hints can always override the old data.
     int mappingCount = settings.beginReadArray(SER_GAMEPADMAPPING);