add config collapse after reading in

jety.go

@@ -175,6 +175,7 @@ func (c *ConfigManager) ReadInConfig() error {
 		conf[lower] = ConfigMap{Key: k, Value: v}
 	}
 	c.mapConfig = conf
+	c.collapse()
 	return nil
 }
 

setters.go

@@ -40,5 +40,7 @@ func (c *ConfigManager) SetDefault(key string, value any) {
 		} else {
 			c.combinedConfig[lower] = ConfigMap{Key: key, Value: value}
 		}
+	} else {
+		c.combinedConfig[lower] = c.mapConfig[lower]
 	}
 }