Hints for retext in main

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translations-not-found
Unable to add languages information, even though a translation tag was present in the MetaInfo file. Please check that its value is set correctly, and all locale files are placed in the right directories (e.g. /usr/share/locale/*/LC_MESSAGES/ for Gettext .mo files).
screenshot-download-error
Error while downloading screenshot from 'https://raw.githubusercontent.com/retext-project/retext/master/data/retext-kde5.png': URL was not found on the server.
This might be a temporary server issue, or the screenshot is no longer available.

asv-developer-name-tag-deprecated
me.mitya57.ReText.appdata.xml:59 -
The toplevel `developer_name` element is deprecated. Please use the `name` element in a `developer` block instead.
asv-developer-info-missing
me.mitya57.ReText.appdata.xml -
This component contains no `developer` element with information about its author.