fix: busy states during governance transactions

[nicole-obrien]

Co-authored-by: Tuditi Tuditi@users.noreply.github.com

Summary

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Fixes #5726

Testing

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[maxwellmattryan]

Looks good! Added a few questions and requested changes 🙏

[maxwellmattryan]

Some feedback from testing:

• (Slightly unrelated but) I got a no unspent voting output found when trying to revote for proposals (after reducing voting power from 1000 to 500 SMR):

  No unspent voting output found
  

  Until I logged out and back in, my voting power went to 0 SMR even though it was reflected in my available balance (500 SMR). When I logged back in it displayed the correct voting power of 500 SMR.
  Since I didn't revote, my expectation was that voting on a proposal would only vote for that single one, but it seems that all my previous votes were remembered. This is convenient for the user since they aren't required to manually re-vote for everything, but it's not the expectation.
• UX-wise, it would feel better if we also disabled the "Cancel" button in the ProposalDetailsView since we do it for the popups.

[nicole-obrien]

• UX-wise, it would feel better if we also disabled the "Cancel" button in the ProposalDetailsView since we do it for the popups.

There is a task to remove this redundant button and replace it with the unvote button so this PR is fine for now

[maxwellmattryan]

LGTM 🔥