Release v4.0.1

Release v4.0.1

Changes since v4.0.0:

• feat: add refresh button to the Find New Apps header (b00b915)
• feat: sort the app browser by source count, not patch count (6b1699f)
• fix: keep source-card actions in place when patches expand (5148d76)
• feat: count distinct patch sources in the app browser (3d01429)
• feat: let Fast Mode walk all globally enabled sources (4ad74b4)
• refactor: make Fast Mode ask prompt resolve after the choice (7a23b1b)
• style: center the app browser control rows (70cd857)
• fix: make system back leave app detail before closing the browser (eb79878)
• fix: sync system bar appearance with the active theme (4b8b4da)