[bug]: Max button not working as expected when sending HNT

### bug

If you set your phone language as English, when sending HNT and you use the MAX button, it works as expected. Let's say you have 2.1877 HNT in your account, pressing the button will set the amount as 2.1877 as expected.

However, if your phone language is not English, (ie: French), the MAX button doesn't work. The "." is not set in the amount so it tries to send 21877 HNT instead of 2.1877.

My guess is that it tries to input a comma instead of a dot in the amount and it fails.

### Transaction Hash

_No response_

### Phone Type

iPhone 12, iOS 15.6

### Network Type

Mainnet