fix models list reload after USB mass storage connection (#5963)

radio/src/storage/modelslist.cpp

@@ -293,6 +293,7 @@ void ModelsList::clear()
     delete *it;
   }
   categories.clear();
+  init();
 }
 
 bool ModelsList::load()

radio/src/storage/sdcard_raw.cpp

@@ -207,6 +207,11 @@ void storageReadAll()
     createModel();
   }
 
+  // Wipe models list in case
+  // it's being reloaded after USB connection
+  modelslist.clear();
+
+  // and reload the list
   modelslist.load();
 }