Sign Out時に航路データ削除

Seilassist/Sailassist/Menu/MenuView.swift

@@ -218,6 +218,11 @@ struct MenuView: View {
 
                     SharingData.pushHistory.focusPushHistory = nil
                     SharingData.pushHistory.pushHistoryData = [:]
+
+                    SharingData.map.wayPoints = []
+                    SharingData.map.legLine = []
+                    SharingData.map.portLine = []
+                    SharingData.map.starboardLine = []
                 }
                 Button("No") {}
             } message: { Text("Are you sure?") }