Hub horizontal scroll hides all items when scrolled to the end

Reproduction steps:
1. Open Unity Hub
2. Click on arrow button in the sorting bar
3. Scroll horizontally to the very end and observe

Actual result: No items are visible at the end of horizontal scroll
Expected result: Hidden parts of items are revealed after scrolling and no unnecessary empty space is displayed

Reproducible with: 3.16.1

Reproduced on: Windows 11, macOS Sequoia 26.2 (M4)

Note: Sort bar doesn’t scroll horizontally, resulting in misalignment between project columns and sort bar