ui: Fix Divider component growing unnecessarily (#44986)

I had previously added `flex_none` to the Divider and that caused it to
grow beyond the container's width in some cases (project panel, agent
panel's restore to check point button, etc.).

Release Notes:

- N/A
775548e93cDanilo Leal committed on 12/16/2025, 12:55:26 PM· committed by GitHubparent90d7ccf
2 files changedLine totals unavailable