v1.15.0

• add: add quick filter buttons for track types on track page
• add: add quick filter buttons for track types on month goal page
• add: add quick filter buttons for track types on search page
• add: add quick filter buttons for track types and years on map page
• add: new chart "speed per track"
• add: show confirmation dialogs on deletion of tracks, gpx files, month goals, custom fields and participants
• fix: broken search page and improve responsiveness
• fix: custom fields: show display name for type instead of enum name on settings page
• fix: month goal distance: inputs not prefilled if german is activated
• fix: gpx upload
• chore: update dependencies