Also allow the german leading quote mark ( Unicode character 0x201C ) as a separator for template quotes. This fixes replies and forwards being empty when running under German locale.

Thanks to Friedrich Kröner for figuring out that this bug was locale-dependent (no wonder we developers couldn't reproduce it).

When translating the templates of KMail, please only use U+0022 or U+201C to translate the quotation mark, otherwise you'll trigger this bug.
Simply using the ASCII " character is the best.