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_lib/core_lib.otmod

@@ -5,6 +5,7 @@ Module
   website: https://github.com/edubart/otclient
   autoload: true
   autoload-priority: 10
+  reloadable: false
 
   @onLoad: |
     dofile 'ext/table'

modules/core_lib/ui/effects.lua

@@ -1,26 +1,34 @@
 Effects = {}
 
 function Effects.fadeIn(widget, time, elapsed)
-    if not elapsed then elapsed = 0 end
-    if not time then time = 250 end
-    widget:setOpacity(math.min(elapsed/time, 1))
-    if elapsed < time then
-        scheduleEvent(function()
-                        Effects.fadeIn(widget, time, elapsed + 30)
-                      end, 30)
-    end
+  if not elapsed then elapsed = 0 end
+  if not time then time = 250 end
+  widget:setOpacity(math.min(elapsed/time, 1))
+  if elapsed < time then
+    removeEvent(widget.fadeEvent)
+    widget.fadeEvent = scheduleEvent(function()
+      Effects.fadeIn(widget, time, elapsed + 30)
+    end, 30)
+  else
+    widget.fadeEvent = nil
+  end
 end
 
 function Effects.fadeOut(widget, time, elapsed)
-    if not elapsed then elapsed = 0 end
-    if not time then time = 250 end
-    widget:setOpacity(math.max((time - elapsed)/time, 0))
-    if elapsed < time then
-        scheduleEvent(function()
-                        Effects.fadeOut(widget, time, elapsed + 30)
-                      end, 30)
-    else
-        widget:destroy()
-    end
+  if not elapsed then elapsed = 0 end
+  if not time then time = 250 end
+  widget:setOpacity(math.max((time - elapsed)/time, 0))
+  if elapsed < time then
+    removeEvent(widget.fadeEvent)
+    widget.fadeEvent = scheduleEvent(function()
+      Effects.fadeOut(widget, time, elapsed + 30)
+    end, 30)
+  else
+    widget.fadeEvent = nil
+    widget:destroy()
+  end
 end
 
+function Effects.cancelFade(widget)
+  removeEvent(widget.fadeEvent)
+end