v1.31.0

• add: redesigned maintenance events page (grouped by type and description, show distances, show distance until today, ...) (#141)
• add: achievements page: show date for longest track and link to corresponding track (#146)
• add: tile hunting: new user settings option to allow access to your tile hunting map via share code (#136)
• fix: responsiveness of settings page (#140)
• fix: responsiveness of track form page (#140)
• fix: responsiveness of annual achievements modals (#140)
• fix: tile hunting map: the total number of visited tiles and the bar chart now correctly shows the visited tiles depending on the selected track types and years (#142)
• fix: track map: the elevation chart is now correctly displayed even if the gpx track does not contain elevation information for the first data points (#145)
• chore: update dependencies