CommaFeed 3.9.0

• improve performance by disabling the loader when nothing is loading (most noticeable on mobile)
• added a setting to disable the 'mark all as read' confirmation
• added a setting to disable the custom context menu
• if the custom context is enabled, it can still be disabled by pressing the shift key
• the announcement feature is now working again and supports html ('announcement' configuration element in config.yml)
• add support for MariaDB 11+
• fix entry header shortly rendered as mobile on desktop, causing a small visual glitch
• fix an issue that could cause a feed to not refresh correctly if the url was very long
• database cleanup batch size is now configurable
• css parsing errors are no longer logged to the standard output
• fix small errors in the api documentation