HTML injection in Desktop Client

There are HTML injections throughout the ownCloud desktop client. A good example of this can be seen in [accountsettings.cpp line 641 to 705](https://github.com/owncloud/client/blob/172689d35cfae5137a316dfdee7dacc9667e1dcc/src/gui/accountsettings.cpp#L641-L705). For reference purposes this is a …

void AccountSettings::refreshSelectiveSyncStatus()
{
    QString msg;
    int cnt = 0;
    foreach (Folder *folder, FolderMan::instance()->map().values()) {
    ...
        foreach(const auto &it, undecidedList) {
            ...
            QString myFolder = (it);
            ... …