feat: flow to stop voting for a proposal

[maxwellmattryan]

Summary

Please summarize your changes, describing what they are and why they were made.

The user must be able to stop voting for a proposal (if it's currently being voted on).

Changelog

- Add popup flow to stop voting for proposal
- Add isVotingForProposal and stopVotingForProposal functions
- Alphabetized popup index component properties

Relevant Issues

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Closes #5267

Testing

Platforms

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• Desktop
  • MacOS
  • Linux
  • Windows
• Mobile
  • iOS
  • Android

Instructions

Please describe the specific instructions, configurations, and/or test cases necessary to test and verify that your changes work as intended.

Vote and stop voting for proposals.

Checklist

Please tick all of the following boxes that are relevant to your changes.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or modified tests that prove my changes work as intended
• I have verified that new and existing unit tests pass locally with my changes
• I have verified that my latest changes pass CI workflows for testing and linting
• I have made corresponding changes to the documentation

[Tuditi]

Some things to change. At the moment an error always shows up when I click on a proposal that hasn't been voted for

[jeeanribeiro]

LGTM! 🚀

Jean and I worked on this together AND implemented your suggestions :)