Add metadata filter dropdowns to sample gallery#62

garrytrinder with Copilot wants to merge 3 commits into

maindev-proxy-tools/dev-proxy-tools.github.io:mainfrom

copilot/allow-filtering-samples-by-metadatadev-proxy-tools/dev-proxy-tools.github.io:copilot/allow-filtering-samples-by-metadataCopy head branch name to clipboard