[EuiDatePicker] Update styles for Amsterdam#5000

Merged

cchaos merged 15 commits intoelastic:masterfrom

cchaos:ams/date_picker

Aug 19, 2021

Commits on Jul 28, 2021

Styling the date numbers
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Commits on Jul 29, 2021

Times
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Commits on Jul 30, 2021

Better header controls
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Mostly all fixed up now
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Fixing border-radius of range inputs
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Better range styling
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Better disabled days
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Separating imports for date picker based on theme
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Commits on Aug 3, 2021

Fix contrast warnings and fullWidth layout
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Commits on Aug 4, 2021

More cleanup
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Commits on Aug 11, 2021

Cleanup
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Merge branch 'elastic:master' into ams/date_picker
cchaos
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cl
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🤞Fixing Safari and Firefox
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Commits on Aug 17, 2021

Fix time list focust states
cchaos
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