Allow parameterization of email subjects

Hi,

Currently there is a documentation on jira website to modity email content :

http://confluence.atlassian.com/display/JIRA/Adding+Custom+Fields+to+Email

However there is no way to modify email subject.

It could be usefull if the subject could be parameterized.

In our case, we had the standard subject :

(issue action) : (issue name) (issue summary)

but we modified MailingListCompiler.java to have :

(issue name) (issue summary): (issue action)

Users in our company prefers that way as it is more easy to sort their emails by subject and group every mail related to a specific issue.

We just modified the file : MaillingListCompiler.java

line 323 :
< return translatedSubject + ": " + emailSubject.getSubjectTrailer();
> return emailSubject.getSubjectTrailer() + ": " + translatedSubject ;

It is an ugly hack for our need but I think it could improve the usability if this things could be modified in administration or user preferences.