stake: Improve collision errors

[lubej]

Current implementation checks for diff between existing staked items and new ones. Add retry logic, so that it is more resilient.

Same goes for un-staking flow.

rose-app/stake/src/pages/UnstakePage/index.tsx

Lines 138 to 144 in e7a68e1

	// This should work in 99% of cases!
	const [diff] = undelegations.filter(
	und =>
	!prevUndelegations.some(prevUnd => {
	return FormattingUtils.serializeObj(prevUnd) === FormattingUtils.serializeObj(und)
	})
	)

rose-app/stake/src/pages/StakingAmountPage/index.tsx

Lines 104 to 109 in e7a68e1

	const [diff] = delegations.filter(
	d =>
	!prevDelegations.some(prevD => {
	return FormattingUtils.serializeObj(prevD) === FormattingUtils.serializeObj(d)
	})
	)