fix(ui): reduce left side grade distribution margin/padding

[aaronthechen]

Fixes #335.

Before:

After:

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This change is 

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[github-actions]

Your pull request title did not conform to conventional commits standards. Our upcoming automated release pipeline will automatically determine
the proper release version based on your pull request title.
Cheat Sheet

• feat: A new feature
• fix: A bug fix
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
• refactor: A code change that neither fixes a bug nor adds a feature
• perf: A code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies (example scopes: gulp, broccoli, npm)
• ci: Changes to our CI configuration files and scripts (example scopes: Travis, Circle, BrowserStack, SauceLabs)
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit

[IsaDavRod]

LGTM

[doprz]

LGTM