MailManager: duplicate HTML IDs

[joebordes]

MailManager index.tpl load the same email template twice:

https://github.com/tsolucio/corebos/blob/master/Smarty/templates/modules/MailManager/index.tpl#L50:L55

but that email template contains HTML elements with unique IDs so they get duplicated and the browser complains.

We must find out why the email form has to be loaded twice and fix the code to work with just one in order to avoid the duplicate IDs