[Bug]: I am able to input negative values to tx amount. Error: new BigNumber() not a base 16 number

[seaona]

Describe the bug

Problem: when I am Sending a tx I can introduce negative numbers by pressing the down arrow of my keyboard. This eventually leads to a tx with 0 value. I guess input should be validated and if negative, we should not be able to proceed to the Confirmation Screen.

The error Uncaught (in promise) BigNumber Error: new BigNumber() not a base 16 number: appears on the console.

https://user-images.githubusercontent.com/54408225/182885986-d86de6f6-6e74-45c6-87fe-c662d5923904.mp4

Steps to reproduce

1. Unlock MM
2. Click Send
3. Introduce any recipient
4. Click Amount and input a random number
5. Press down arrow key for a couple of times

Error messages or log output

Uncaught (in promise) BigNumber Error: new BigNumber() not a base 16 number: No response

Version

10.18.2

Build type

No response

Browser

Chrome

Operating system

Linux

Hardware wallet

No response

Additional context

No response