Review a few updater preferences

We have this block of preferences in 000-tor-browser.js:

pref("app.update.notifyDuringDownload", true);
pref("app.update.url.manual", "https://www.torproject.org/download/languages/");
pref("app.update.url.details", "https://www.torproject.org/download/");
pref("app.update.badgeWaitTime", 0);
pref("app.releaseNotesURL", "about:blank");
// disables the 'What's New?' link in the about dialog, otherwise we need to
// duplicate logic for generating the url to the blog post that is already more
// easily found in about:tor
pref("app.releaseNotesURL.aboutDialog", "about:blank");
// point to our feedback url rather than Mozilla's
pref("app.feedback.baseURL", "https://support.torproject.org/%LOCALE%/get-in-touch/");

Some of them could probably be moved to 001-base-profile.js, and we will need a few values for Mullvad Browser.