3.1.0

Added

• Add 'IS EMPTY' and 'IS NOT EMPTY' filter type for reports
• Filter suggestions option on filter prompt modal to show or hide suggestions
• Add CSS class "scrollable-dropdown-menu" for filter suggestions and filter type input
• Now it's possible to delete a role, even if it contains users (with mention on modal)
• Added tooltip on layer elements to show their description
• Added a 'return to home' button on pages where the sidebar is not visible
• Show the number of rows returned by a query in report editor

Changed

• Moved notifications from top-right corner to bottom-right corner because they
  were hiding action buttons
• The default behaviour after saving a layer/report/dashboard has changed: now
  we stay on the same page so we can continue editing.
  Other options have been added in a dropdown button

Fixed

• Fixed XLSX export miscalculation of column id which caused some columns to
  be filled with 'undefined'
• Removed the red background of each cell in XLSX export
• Throw error when export failed with Pikitia
• Now filters on reports or dashboards can be exported as PNG or PDF and stay
  updated with results
• Fixed filter suggestions not being shown entirely in dashboard