Fixes for webgui and more native gui development

yms/model/vessel.py

@@ -22,14 +22,24 @@ class Vessel(DbRecord):
             "WHERE v1.vid>=0 AND v2.vid IS NULL"
             )
         self.dcur.execute(sql)
-        row = self.cur.fetchone()
+        row = self.dcur.fetchone()
         if row is None:
             # vessel table empty: create first vessel
             self.pk_value = 1
         else:
             # create additional vessel
             self.pk_value = row['newid']
+        self.clear()
+        self.vid = self.pk_value
         self.vesselname = f"Vessel #{self.pk_value}"
         self.vtype = 1 # monohull
         self._insert()
         self.conn.commit()
+
+    def save(self):
+        super().save()
+        self.conn.commit()
+
+    def delete(self):
+        # there must be no assiciated data!
+        pass