Addresses concerns in https://github.com/ppy/osu/pull/36193#issuecomment-3728177951 (excluding the last part, that is too involved and I can't imagine any workaround for it due to how strict the `Dropdown` structure is). Also adds truncation/padding to header label and search bar. Preview: https://github.com/user-attachments/assets/8885cb90-44dc-42ee-af21-cb33f7723e63
Salman Alshamrani