Samuel Mbabhazi
7493f83176
Convert the legacy comma-separated rgb()/rgba()/hsl()/hsla() notation to the modern space and slash separated syntax in DevTools CSS files and in the shipped themed SVG icons. Every converted value is numerically identical to the original. Deliberately left unchanged: test fixtures and expectations (computed values still serialize to the legacy syntax), the vendored CodeMirror stylesheets, and the contributor docs diagrams. The remaining occurrences in JS files can be handled in a follow-up, since most of them are computed-value assertions in tests. Differential Revision: https://phabricator.services.mozilla.com/D322271