fix: state reset after logout

[Tuditi]

Summary

Only updateParticipationOverview if account index has been changed.

Changelog

- remove redundant resetDashboard()
- reset ParticipationOverview, when account index changes
- remove rerender when accountIndex changes

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.

...

Checklist

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• 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

[MarkNerdi996]

LGTM 👍