fix outfit glitches, init combobox, move shaders, remove unused particles files, create timer utility

modules/addon_playground/playground.lua

@@ -1 +1,10 @@
--- place any code for testing purposes here
+-- place any code for testing purposes here
+
+function init()
+  local box = UIComboBox.create()
+  box:setStyle('ComboBox')
+  box:moveTo({x=100, y=8})
+  UI.display(box)
+end
+
+addEvent(init)