Release v8.6.0

• [Translation] Updated Translations (#3769)
• [fix] [hot] timeline.js (#3752)
• Allow SSL connections to a remote database server (#3742)
• Email header (#3748)
• [minor] allow tests with longer timeout
• [minor] allow tests with longer timeout
• [versioning] check for empty field values (#3739)
• Slickgrid ltr in rtl mode (#3744)
• Auto email report redesign (#3730)
• [tests] refactor tests (#3743)
• Email styling using email.less (#3704)
• [Print format] Translate section headings, hide sections with no data (#3697)
• [minor] added empty line after country fixture installation (#3740)
• [minor] link filters should be selectable (#3736)
• Fixing tests (#3735)
• [minor] no controller_list.js in doctype boilerplate
• [fix] formatters
• [tests] allow test anywhere in app and add boilderplate _test_controller.js (#3724)
• [UI Test] Module view (#3707)
• [minor] added timeout while setting values