Changing footer result in an unexpected result.

[zhiyan114]

Problem

When user changes the footer text, the the text will concatenate with ticket.pm (i.e. setting the footer to "test" result in ticket.pmtest footer)

Solution

Automatically includes - to the text if the user adds something to the footer. This is the best compromise while including ticket.pm on the footer.

[zhiyan114]

Fixed with commit f84c0a6