Removed broken Report a bug iframe from the webui. fixes qbittorrent/qBittorrent#1343
Removed broken "Documentation" iframe from the webui. Improves fix qbittorrent/qBittorrent#1343
Removed essentially useless "Visit website" iframe and changed it to a regular link. Improves fix qbittorrent/qBittorrent#1343
Merge pull request #1881 from benhutchins/feature-webui-safe

Fix Help menu links in WebUI