fix: Docs bugs from testing

[devongovett]

From testing:

• The datepicker example on the home page could use some more padding between the year and its calendar trigger button (DL)
• The "Ready for an international audience" calendar could use some padding on the right, the next button and dates are partially cut off (DL)
• In Firefox, when you select a filter, the table header moves down. Screenshot 2 (DG)
• ListBox overflows select popover in Firefox. See Locale select in i18n section (DG)
• the images aren't centered in the row whereas they are in the home page? Not sure what the difference is between the two, screenshot 7 (DL)
• RAC Swipeable Tabs - Missing high contrast style (DG)
• RAC Photos Example - Chevron is not centered when expanding items. see screenshot 11(YL)
• Regression in Copy button placement for code snippets. See screenshot 3. (RB) Migration docs
• Should we add placeholders to the examples in the Form guide for S2? (YL)

Also improved code wrapping on mobile, especially standalone code blocks (where the example is not rendered, only the code).

[rspbot]

Build successful! 🎉

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[rspbot]

Build successful! 🎉

• View the storybook
• View the S2 storybook
• View the documentation
• View the S2 docs