Add style sheet for constant variables
Fix editor item positioning for border-box sizing
Add data-dnt-row attribute to new row if missing
Adapt editor image dialog for BS3
Adapt image upload dialog for bootstrap 3
Adapt image archive picker modal for BS3
Remove unused style
Add default styling to form-control-static
Move widget editor styles to separate sheet
Use classes for css styling, not data attributes
Adapt all widget edit dialogs for BS3
Move user account form styles to separate sheet
Adapt user update-account form for BS3
Adapt user password form for BS3
Adapt user account form for non-members for BS3
Adapt norway ticket form for BS3
Adapt restore-password form for bootstrap 3
Use explicit class for inline elements, don't assume name
Adapt gift-membership form for BS3
Rename rounded-corners -> border-radius