CW-1090 - refactored field_theme, CW-1086 se translation en default for events and refactored some fields
CW-891 addded Related Events block in sidebar
CW-1086 fix form validating function for langauge
Fix events admin views
CW-1085 added now as default date for events filter start date
Merge branch 'develop' of github.com:EU-OSHA/osha-website into develop