fix(filter modal): wrap modal footer action buttons in a .row
impr(directives): force use of attribute to declare directives

It allows styles to be cleanly be namespaced using [directive-name].

Related to: CAM-3054
impr(grunt): watch deeper for style file changes

Related to: CAM-3054
refactor(styles): clean up and and re-organize the less files

Related to: CAM-3054

Minor refactoring of the less files.
chore(help): add a less variables example

Related to: CAM-3088