PopMan 1.3.12 released

[Christian]

Changes

(*) Better decoding of attachment names (RFC 2231)
(*) Improved decoding of HTML entities (e.g. µ)
(*) Increase font size in About dialog, MessageView and Trash button
(*) Remove version from main window title, i.e. "PopMan" instead of "PopMan 1.3"
(*) Update Italian.lng (thanks to Claudio)
(*) Improved installer (thanks to Claudio)
(*) Improved link extraction from HTML message content
(*) HTML parsing: Remove unnecessary whitespaces from the beginning of a line
(-) Saving some settings (e.g. column width) did not work when rebooting Windows