Feature/main menu home icon

css changes for div containing home icon
home-icon is supposed to be enclosed in a div(class ="home-icon") tag in main_menu.handlebar

changes in showLevelIcons() and removeLevelIcons() to append and remove the above div in the second level.


Pivotal story reference.
https://www.pivotaltracker.com/story/show/61909546

Also refer to.
https://github.com/PrimeRevenue/SCiCustomer/pull/1407