Smooth out menu animation

[mmistakes]

When tapping on sub menus there is a slight animation hiccup as the menu pulls in from the bottom of the screen.

[JISyed]

I was able to fix this bug on my site (which is a heavily modified clone of your theme). My solution may be a little "hacky", but it works on my computer and my iPhone.

See these 3 commits for insight to fixing the issue (the commits are small):

• 89b3f1b
• c998bbd
• 7ede832

Hope that helps!