Simpl-cloud

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- Consider character complete if instance is ended.

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- Add status property to Character.

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- Improve the BalanceTeams mutation flexibility some more.

- Better formatting for summary page.

- Fix badges for unfinished session groups, and add a bit of tab styling.

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- Fix issue with initial data loading failure.

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- Update JS static files from v0.53 changes.

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- Improve sessions handling (don't require times, any string will do).

- Fix bug with auto-balance.

- Add some flexibility to the BalanceTeams graphQL mutation.