Mark deleted as viewed, sort all files by number of changes

cleanupPR.js

const container = $('#files');
const files = Array.from($$('.file'));
const getSortText = (el) => el.querySelector('.diffstat').innerText;
files.sort((a, b) => {
    const aSortText = getSortText(a);
    const bSortText = getSortText(b);
    if (aSortText > bSortText) return 1;
    if (aSortText < bSortText) return -1;
    return 0;
});
container.innerHTML = ''
for (const file of files) {
    container.appendChild(file);
}
const openFiles = Array.from($$('.file.open'));
const deletions = openFiles.filter(file => file.querySelector('.diffstat[aria-label*=": 0 additions"]'));
const markAsViewed = (fileEl) => fileEl.querySelector('[class*=reviewed-toggle]').click();
deletions.map(markAsViewed);