restore inventory and healthbar

* make inventory/healthbar work again allowing reload
* changes in top menu toggle buttons
* all modules are now reloadable by default
* fix warning when using fade in
* remove some unused files

modules/core_styles/core_styles.otmod

@@ -5,6 +5,7 @@ Module
   website: https://github.com/edubart/otclient
   autoload: true
   autoload-priority: 20
+  reloadable: false
 
   @onLoad: |
     importFont 'fonts/verdana-11px-antialised'