Fix scrollbar in Open Trades screen [1 XMR]
This issue requests fixing the scrollbar to the Open Trades screen, which can cut off the button to send payment, especially with long payment methods like Pay by Mail or on low resolution screens.

For example:

![image](https://github.com/haveno-dex/haveno/assets/13068859/7fe3ac39-ca87-403e-b0d4-38e8f8917321)

<img width="1018" alt="image" src="https://github.com/haveno-dex/haveno/assets/13068859/90de9754-d83b-4e4a-bf52-c72a1cd0f151">