Added a confirm prompt to Subscribe/Unsubscribe button #86
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In the past I lost my changes several times, because after typing in the wrong captcha and a site-reload I used the wrong button to submit the form.
Before this change a already typed comment would be lost easily when accidally pushing
one of the 'Subscribe' or 'Unsubscribe' buttons.
After this change a additional prompt will show up, when the comment-textarea is not empty at the time you click 'Subscribe' or 'Unsubscribe'.
When the textarea is empty no prompt is shown and everything works like before