The gestures which were being added to side menu content were also
adding the `disable-user-behavior` class, which disabled
contenteditable elements. Now passing in the gesture option
stop_browser_behavior=false, along with adding the options param to the
gestures service. Fixes#421
When a list was within a side menu it could scroll up and down, but if
the user happened to drag a little bit on the X axis, then it would try
to open the side menu and the Y scroll of the content stopped. Closes
#1541