DM S08: Fix issue with objectives and improve closing scene

If Ur-Thorodor moves off of keep and Delfador is next to him, scenario
doesn't end, which looks odd. So prevent Ur-Thorodor from moving.

Make end scene look better by moving Delfador to the keep for meditating.

data/campaigns/Delfadors_Memoirs/scenarios/08_Ur_Thorodor.cfg

@@ -140,6 +140,9 @@
                 carryover_percentage=80
             [/gold_carryover]
         [/objectives]
+
+        {FREEZE_UNIT Ur-Thorodor} # To avoid the silliness of him
+        # being away from the castle and next to Delfador
     [/event]
 
     ### give the Woses a boost when their leader is first attacked
@@ -230,6 +233,15 @@
 
         [redraw][/redraw]
 
+        [delay]
+            time=1000
+        [/delay]
+        {MOVE_UNIT (id=Delfador) 23 11}
+        {MODIFY_UNIT (id=Delfador) facing sw}
+        [delay]
+            time=500
+        [/delay]
+
         [message]
             speaker=narrator
             message=_"As the Wesnothians withdrew from the island, the woses melted away into the trees. Delfador began the meditation that would place him in contact with the spirit world.

data/campaigns/Delfadors_Memoirs/utils/misc.cfg

@@ -122,3 +122,33 @@
         blue=0
     [/color_adjust]
 #enddef
+
+#define FREEZE_UNIT ID
+    [object]
+        silent=yes
+        duration=scenario  # So this object will not be in the save files forever.
+        [filter]
+            id={ID}
+        [/filter]
+        [effect]
+            apply_to=movement_costs
+            replace=no  # So this amount is added to the current number.
+            [movement_costs]
+                shallow_water=100
+                reef=100
+                swamp_water=100
+                flat=100
+                sand=100
+                forest=100
+                hills=100
+                mountains=100
+                village=100
+                castle=100
+                cave=100
+                frozen=100
+                unwalkable=100
+                fungus=100
+            [/movement_costs]
+        [/effect]
+    [/object]
+#enddef