Change the web application to have a unified font-family

[tohuynh]

Describe the Bug

A clear and concise description of what the bug is.
Some text in web app has font-family: Lato,'Helvetica Neue',Arial,Helvetica,sans-serif (e.g. Session 1 in the Event page), while others have font-family: Inter,X-LocaleSpecific,sans-serif;

Expected Behavior

A clear and concise description of what you expected to happen.

We want just one font-family for all texts and it should be Inter,X-LocaleSpecific,sans-serif;

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I suspect the fix requires digging into semantic-ui-css/semantic-ui-react config to set the font-family.