Refactor sidebar functions

[fofajardo]

Most of the functions are scattered all over the place in different JS files.
Create:

• AiOS.Sidebar.* (sidebar.js, move from aios.js)
• AiOS.Toolbar.* (toolbar.js, rename aios_tbx.js and parts from aios.js)
• AiOS.Utils.* (utils.js, rename from _helper.js)