chore(): small docs & layout fixes

Closes #765
fix(dialog): correct the opening position when opening from a button

Closes #757. Closes #746.

Thanks @filod.
pre-release(0.6.0-rc3): prepare changelog
release: version 0.6.0-rc3
refactor(progressCircular): rewrites CSS for circular progress indicator
refactor(progressCircular): rewrites determinate circle to work with new
markup