More logic for deleting databases

app/Models/Server.php

@@ -143,6 +143,14 @@ class Server extends Model implements CleansAttributes, ValidableContract
         return Schema::getColumnListing($this->getTable());
     }
 
+    /**
+     * @return bool
+     */
+    public function isInstalled(): bool
+    {
+        return $this->installed === 1;
+    }
+
     /**
      * Gets the user who owns the server.
      *