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Fix #1341232 [minor additional update to ScienceDaily recipe](https://bugs.launchpad.net/calibre/+bug/1341232)
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Nicer layout for Tag Browser panel in Preferences
Edit Book: When right clicking on a link add a menu entry to open the link
Fix #1341240 [zsh-completion silently fails to install](https://bugs.launchpad.net/calibre/+bug/1341240)
Edit Book: Add in-context help for HTML and CSS

Now, you can right click on any HTML/OPF/NCX tag name or CSS property
and the editor will open some help for that item in your browser.
Update F-Secure

Fixes #1341300 [small update to F-Secure Weblog recipe](https://bugs.launchpad.net/calibre/+bug/1341300)