Set option "text only" for RssFeeds

Some RSS feeds contain no images. In case you use a feed like this, you'd want to use a text only feed widget.

created branch 5-set-option-text-only-for-rssfeeds to address this issue

changed the description

created merge request !7 (closed) to address this issue

mentioned in merge request !7 (closed)

mentioned in merge request !8 (merged)

closed via merge request !8 (merged)

mentioned in commit 5dd0bd56

mentioned in merge request !10 (merged)

mentioned in commit 3448971f