Subject: [trojita] /: Merge changes from topic

Git commit 5a330ec192c257fcc6b0563cb14be6488f0c9d15 by Gerrit Code Review, on
behalf of Jan Kundrát.
Committed on 12/01/2017 at 08:42.
Pushed by gerrit into branch 'master'.

Merge changes from topic 'network-unavailable-and-offline-are-different'

* changes:
Merge branches 'fetch-binary-cte' and
GUI: Tweak display of parts that failed to load in WebKit
Gui: Fix icon name
GUI: Show accurate error message when a part fails to load in the GUI

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