Style tweaks to popup menus
Fix incorrect output for float helper classes
Refactor off-canvas markup and styles
Add interial scrolling to off-canvas menus, add event to close menu on frame click
Tweak functions file, off-canvas, and popup menus
Convert action sheet and popup menu into separate mixins
Refactor icon bar slightly, convert to mixins
Experimenting with combining mixins and placeholder selectors
A few more fixes to modifier classes for icon bar