[refs #160] Change the way triangle is generated in care cards #269
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Description
Using the clip path method for generating the care card triangles makes
it not show up in High Contrast Mode in Windows. This was picked up in a
DAC report. Despite looking at a gov.uk blog post on this
(https://accessibility.blog.gov.uk/2018/08/01/supporting-users-who-change-colours-on-gov-uk/)
it still didn't seem to work in High Contrast Mode, so it has been
changed to borders and transforms, inspired from
https://codepen.io/mpeace/pres/eBOVGe
Component checklist