Refactor game fullscreen code

[Johnwz123]

Description

Follow-up on #2855

Refactor Game fullscreen button to match Playground side content fullscreen button

• Replace Icon with Button
• Replace htmlTitle with Tooltip
• Move function declarations out of useEffect body
• Change to use class instead of id
• Remove unnecessary styles

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update
• Code quality improvements

How to test

Checklist

• I have tested this code
• I have updated the documentation

[coveralls]

Pull Request Test Coverage Report for Build 8912431498

Details

• 0 of 13 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 33.067%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/pages/academy/game/Game.tsx	0	13	0.0%

Totals
Change from base Build 8912047561:	0.0%
Covered Lines:	5299
Relevant Lines:	14891

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💛 - Coveralls

[RichDom2185]

LGTM, thanks!