[BUG]: Search input field will be cut by overflow

[endrilickollari]

When the user has to choose a coin when sent from the address book, while scrolling to choose a coin, the search input field will be cut by overflow. So that field needs to stay static at the top position.

https://drive.google.com/file/d/141KP2E9bb8gZJi8caneyH2T1YIxZmRbh/view?usp=drive_link

Operating Environment(s):

• OS: Windows
• OS version: 10
• AtomicDEX Version: 0.5.8