Add option to duplicate rules

[spotlesscoder]

I maintain rules for alerting to JIRA and via email in separate files because I use different realert intervals for them.

I usually create the JIRA version first, then I create the email version simply by copying the JIRA and making changes to the alert section and add the necessary attributes.

In the overview of the rules, I want to be able to copy those rules.

For that, each "rule button" (the ones you click to get to the source) should have a copy icon. If this is clicked, a popup window should show up, ask for the new name and when entered a name different than the existing rules file names, the rule should be copied to a file with the supplied name