fix padding on mobile error messages, fixes #48
give custom pages some padding at the bottom, fixes #49
give images and other objects in custom pages a max width, fixes #50
fix top padding on page headers, fixes #51
color label using sidebar_link_color, fixes #52
give product description proper bottom padding, fixes #53
show images inline in mobile gallery, fixes #54
use sidebar color instead of background color for cart pip, fixes #55
adjust spacing for cart to be more globally consistent, fixes #56