Make snackbar responsive to keyboard

[micahmo]

Pull Request Description

This PR allows the snackbar to responsively change height in response to things like the keyboard.

Hide whitespace.

Issue Being Fixed

Issue Number: N/A

Screenshots / Recordings

Before

qemu-system-x86_64_6dS8S6aNkS.mp4

After

qemu-system-x86_64_Zl2kFwU6dd.mp4

Checklist

• If a new package was added, did you ensure it uses an appropriate license and is actively maintained?
• Did you use localized strings (and added appropriate descriptions) where applicable?
• Did you add semanticLabels where applicable for accessibility?

[hjiangsu]

LGTM! This was also something that was bothering me a bit so thanks for working on it!