fix: OPTIC-45: Font styles incorrect on settings pages

[bmartel]

PR fulfills these requirements

• Commit message(s) and PR title follows the format [fix|feat|ci|chore|doc]: TICKET-ID: Short description of change made ex. fix: DEV-XXXX: Removed inconsistent code usage causing intermittent errors
• Tests for the changes have been added/updated (for bug fixes/features)
• Docs have been added/updated (for bug fixes/features)
• Best efforts were made to ensure docs/code are concise and coherent (checked for spelling/grammatical errors, commented out code, debug logs etc.)
• Self-reviewed and ran all changes on a local instance (for bug fixes/features)

Change has impacts in these area(s)

(check all that apply)

• Product design
• Backend (Database)
• Backend (API)
• Frontend

Describe the reason for change

Due to various used UI libraries and differing load orders throughout, in some pages Semantic UI library would overtake the default page font family. To combat this, the font-family is being set to Roboto with important, as this is the single font family in use within LabelStudio as curated by the design team and Semantic UI's reference to Lato should not take precedence anywhere in the application.

Does this PR introduce a breaking change?

(check only one)

• Yes, and covered entirely by feature flag(s)
• Yes, and covered partially by feature flag(s)
• No
• Not sure (briefly explain the situation below)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (caa6f23) 76.03% compared to head (42fa252) 76.03%.

Additional details and impacted files

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##           develop    #5080   +/-   ##
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  Coverage    76.03%   76.03%           
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  Files          154      154           
  Lines        12792    12792           
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  Hits          9726     9726           
  Misses        3066     3066           

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