Add a Junk button to Mail’s standalone message viewer

macosxhints.com:
Quit Mail and choose ‚Show Package Contents‘ by control-clicking on the Mail program. Use any text editor to edit the file at Mail -> Contents -> Resources -> TornOffViewer.toolbar. Add the following text after the deleteMessages: item in the toolbar array:

{
help = „TOOLTIP_JUNK“;
identifier = „markAsJunkMail:“;
image = junkmail;
tag = 0;
title = „TOOLBAR_JUNK“;
altTitle = „TOOLBAR_NOTJUNK“;
},
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