change: mod metadata improvements

- Use slug instead of name
- Keep temporary status before having local details

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/minecraft/mod/tasks/ModFolderLoadTask.cpp

@@ -71,7 +71,7 @@ void ModFolderLoadTask::run()
 
                 auto metadata = m_result->mods[chopped_id].metadata();
                 if (metadata) {
-                    mod.setMetadata(new Metadata::ModStruct(*metadata));
+                    mod.setMetadata(*metadata);
 
                     m_result->mods[mod.internal_id()].setStatus(ModStatus::Installed);
                     m_result->mods.remove(chopped_id);