Clean up deprecated files
Use $font-weight-bold sass variable
Use a font weight of 400 by default to improve readability; Keep font-weight-bold preference in case we want to use it later
Styling fixes for firefox
Access offsetLeft property in order to cause the browser to do a relayout right away instead of using a timeout. This solves the problem of transitions not working when applied right after adding an element to the rendering tree but without introducing a race condition.
Use same technique as in eff56ea8c7ff4c8b412463facb4c955a22814c0f to make sure view transitions are always performed correctly
Two fixes to make the dialog animations work properly in firefox:

1. Don't use a prefix in firefox when setting the style property directly
2. Set the complete style property as setting the transition-delay separately doesn't seem to work
Refactor/optimize bounce-in animation in category view to make sure it behaves consistently across browsers
Add bounce animation when a category is selected
Fix padlock-select element on firefox