Update font sizing #74
Merged
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Previously, font sizing in cs-web-lib used the 62.5% font-size trick for font-sizing, which requires client applications to set the root font size to 62.5% for fonts to appear the correct size. This isn't very transparent and there seem to be mixed reviews on using it. It causes issues when trying to use cs-web-lib in a client application that uses e.g. MUI components alongside bob screens.
I have swapped the font back to calculating REM from pixels by using the browser default font size of 16px and added a comment for context. This won't scale correctly if a browser user manually adjusts the browser default font size, but the .bob screens don't scale correctly anyway.