Search on supplier name attached to maintenance

Signed-off-by: snipe <snipe@snipe.net>

app/Models/AssetMaintenance.php

@@ -73,6 +73,7 @@ class AssetMaintenance extends Model implements ICompanyableChild
         'asset'     => ['name', 'asset_tag'],
         'asset.model'     => ['name', 'model_number'],
         'asset.supplier' => ['name'],
+        'supplier' => ['name'],
     ];
 
     public function getCompanyableParents()