v4.0

• changed: always show custom legend
• changed: group module registration
• changed: manage chart width with css now
• changed: mapping js now happens in elgg-plugin
• changed: moved plugin initialisation to elgg-plugin
• changed: toggle tabs now use a page component
• changed: unified breadcrumbs
• changed: updated action responses
• changed: updated chartjs to 2.7.3
• changed: updated settings form
• changed: upped minimal requirement to Elgg 3
• fixed: EntityTools support
• fixed: only show tabs if usefull