Resize layout problem with post welcome flow landing page

[niik]

Describe the bug

The post-welcome flow landing page on Windows doesn't respond as intended when being resized. Assuming this is related to #8791 or #8959 (i.e #8967).

Tentatively putting this in the 2.4 release as it appears to be a regression from what's on prod at the moment.

Version & OS

Latest development build (452c89d). Windows 10 and macOS 10.15.3

Steps to reproduce the behavior

1. Remove all repositories to get to the post-welcome flow landing page
2. Wait until the list of cloneable repositories has loaded
3. Select any repository from the list such that the blue clone button shows up at the bottom of the page

4. Resize the application window

Expected behavior

That the ProTip box as well as the clone button to be anchored toward the bottom of the view

Actual behavior

The clone button and the ProTip box are positioned outside of the bounds of the application Window.

Screenshots

Logs

N/A

[rafeca]

After looking at it for a bit I've found that this can get fixed by adding an overflow: auto property to the .filter-list-container selector.

I'm going to try to find an alternative solution since I'd prefer to not touch the styling of FilterList that is used by many other components in the app (although I don't think that the change would be risky).