Remove style attribute from mainNav after slide up, fixes #99
Remove style attribute from mainNav after slide up, fixes #99

After showing/hiding the menu in mobile mode, switching to fullscreen leaves the mainNav hidden because jquery set style="display: none;" at the end of the slideUp() animation.  This clears the style so it displays again.

tavriaforever/JavaScript-Garden,xis19/JavaScript-Garden,anityche/JavaScript-Garden,cesarmarinhorj/JavaScript-Garden,kamilmielnik/JavaScript-Garden,Krasnyanskiy/JavaScript-Garden,it-na-move/JavaScript-Garden,BonsaiDen/JavaScript-Garden,xis19/JavaScript-Garden,manekinekko/JavaScript-Garden,it-na-move/JavaScript-Garden,mosoft521/JavaScript-Garden,shamansir/JavaScript-Garden,it-na-move/JavaScript-Garden,xis19/JavaScript-Garden,anityche/JavaScript-Garden,kamilmielnik/JavaScript-Garden,cesarmarinhorj/JavaScript-Garden,itsimoshka/JavaScript-Garden,shamansir/JavaScript-Garden,dongfeng2008/JavaScript-Garden,hehuabing/JavaScript-Garden,manekinekko/JavaScript-Garden,TangTaigang/JavaScript-Garden,Krasnyanskiy/JavaScript-Garden,anityche/JavaScript-Garden,hehuabing/JavaScript-Garden,kevingo/JavaScript-Garden,cesarmarinhorj/JavaScript-Garden,kamilmielnik/JavaScript-Garden,BonsaiDen/JavaScript-Garden,BonsaiDen/JavaScript-Garden,tavriaforever/JavaScript-Garden,julionc/JavaScript-Garden,kevingo/JavaScript-Garden,dongfeng2008/JavaScript-Garden,itsimoshka/JavaScript-Garden,itsimoshka/JavaScript-Garden,manekinekko/JavaScript-Garden,shamansir/JavaScript-Garden,TangTaigang/JavaScript-Garden,mosoft521/JavaScript-Garden,tavriaforever/JavaScript-Garden,julionc/JavaScript-Garden,Krasnyanskiy/JavaScript-Garden,TangTaigang/JavaScript-Garden,hehuabing/JavaScript-Garden,mosoft521/JavaScript-Garden,kevingo/JavaScript-Garden,julionc/JavaScript-Garden,dongfeng2008/JavaScript-Garden