Update MultiSend contract address.

[nicosampler]

Closes #1162

• I have also fixed a visual problem with Apps loader icon. It was not centered.

[github-actions]

ESLint Summary View Full Report

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Type	Occurrences	Fixable
Errors	0	0
Warnings	7	0
Ignored	1	N/A

• Result: ✅ success

• Annotations: 7 total

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[warning] @typescript-eslint/explicit-module-boundary-types

Require explicit return and argument types on exported functions' and classes' public class methods

• src/routes/safe/components/Apps/sendTransactions.ts Line 18 - Missing return type on function.
• src/routes/safe/components/Apps/sendTransactions.ts Line 18 - Argument 'dispatch' should be typed.
• src/routes/safe/components/Apps/sendTransactions.ts Line 18 - Argument 'safeAddress' should be typed.
• src/routes/safe/components/Apps/sendTransactions.ts Line 18 - Argument 'txs' should be typed.
• src/routes/safe/components/Apps/sendTransactions.ts Line 18 - Argument 'enqueueSnackbar' should be typed.
• src/routes/safe/components/Apps/sendTransactions.ts Line 18 - Argument 'closeSnackbar' should be typed.
• src/routes/safe/components/Apps/sendTransactions.ts Line 18 - Argument 'origin' should be typed.

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^{Report generated by eslint-plus-action}

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