Fix currency input

[thomtrp]

Fix #7458

[greptile-apps]

PR Summary

This pull request addresses a bug in the currency input functionality, focusing on properly handling and displaying currency values with thousands separators. Here's a concise summary of the changes:

• Fixed currency input trimming issue in CurrencyInput.tsx by adding 'unmask' prop to StyledIMaskInput
• Updated CurrencyDisplay.tsx to correctly process and display full amount values, including commas
• Modified logic for calculating 'amountToDisplay' in CurrencyDisplay component
• Imported 'isUndefinedOrNull' utility function in CurrencyDisplay for improved null checks
• Ensures proper handling of currency values like '400,000' without trimming at the first comma

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