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Enh: Added PolymorphicRelation::strict to throw exceptions when accessing invalid polymorphic relations
Fix: Mail summaries not correctly triggered by cron
Fix: Click to topics lead on streams without topic filter throws javascript error. (https://github.com/humhub/humhub-modules-polls/issues/49)
Fix: Existing files may cause NULL pointer exception
Fix: Newly created profile fields cannot be updated
Enh: Added AbstractRichTextEditor::layout in order to change richtext style
Enh: Added block type RichText for non focus menu style