StatusButton has a lot of issues when it comes to consistent behaviour
and look & feel. This includes things like calculating incorrect
hover colors as well as not being flexible enough to be used in various
scenarios
This commit changes StatusButton so that it's able to handle outlined
versions of warn buttons, calculates proper colors and more.
Many of these changes introduce heuristics to make things work.
In the long run, we should revisit the different variants that exists
(primary, secondary, outlined, warn etc) to encode them properly
in the API.
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