Inventory_0.6.2 added drawer, fixed colors in add menu, enlarge add spinner

ArduinoUNO_webLed:
http://www.youtube.com/watch?v=RmIe_rPu6Pw&feature=youtu.be

Inventory:
- added drawer with possibity to choose displaying only empty items
- fixed colors in add menu in order to be visible
- enlarge spinner for category in add  actvity