Slippage tolerance form : Decimal behavior issue

### Describe the problem you discovered

in slippage tolerance, pressing the “comma” key does not produce a “.” as it does in token amounts, but deletes the digit.

### Describe the solution you'd like

_No response_

### Epic

_No response_

No file or test is identified. Start by locating the slippage tolerance form and compare its comma-key handling with the token amount input. Done means pressing the comma produces a "." instead of deleting a digit.

Written by the indexing model from the issue text.