Merge pull request #172 from sandriu/2567_newsletter_all

Refs #2567 partial improvement for newsletter body
Merge pull request #175 from sandriu/2567_newsletter_all

Refs #2567 fix the width for left and right columns
Merge remote-tracking branch 'upstream/2567_newsletter_all' into 2567_newsletter_all
Refs #2567: simplify layout for items inside right column
Refs #2567: add dotted line for each item of News, Events, Blog etc