Fixed
- Login logo overflow and disproportionate sizing (consolidated styles, added max-width constraint, removed conflicting inline style block).
- Update Manager desktop button layout (toolbar/pane actions now use flex for proper wrapping).
- Sort dropdown arrow restored (CSS shorthand was removing Bootstrap background-image).
- Search icon alignment in toolbar pill.
- Checkboxes in all Update Manager tabs now clearly visible with themed styling and dark-mode support.