Fix CDN Loading wherever it is possible
Now that we have the CDN fully activated on production we saw that there are several places where the CDN was not used but it could be.
You can easily determine if we are using CDN urls by using this script
$('img[src^="/uploads"], img[src^="https://gitlab.com/uploads/"]').css('border','solid 3px orange');
- /explore is not using on even public projects the CDN
- Todo List is not using the CDN for user avatars
- Projects dropdown in the menu is not using the correct Avatar URL's
- Issues page has a non CDN avatar