This commit improves the appearance of `.filter-button` elements used to jump between different categories in "Contributors" and "Resources" pages. Before (wide screen): ![contributors buttons (wide screen) before][1] Before (narrow screen): ![contributors buttons (narrow screen) before][2] After (wide screen): ![contributors buttons (wide screen) after][3] After (narrow screen): ![contributors buttons (narrow screen) after][4] This change has been extracted from #36045. [1]: https://user-images.githubusercontent.com/8604205/108414895-72376c00-7235-11eb-9537-7a7b059d09fe.png [2]: https://user-images.githubusercontent.com/8604205/108414923-782d4d00-7235-11eb-8ba4-87a3a9ae14cd.png [3]: https://user-images.githubusercontent.com/8604205/108414929-78c5e380-7235-11eb-807a-109b4200e64e.png [4]: https://user-images.githubusercontent.com/8604205/108414942-7cf20100-7235-11eb-8ef0-9b2da397b3ee.png Co-authored-by: Stefanie Fluin <sjtrimble@gmail.com> PR Close #40944