LoW: Fix track of chapters 3-5

While chapter 3 only skipped one track, leading to an off by one error,
the track of chapter 4 had to be fixed and the SAURIANS track for chapter
5 had to be made completely anew.

[skip ci]

data/campaigns/Legend_of_Wesmere/scenarios/chapter2/08_Council_of_Hard_Choices.cfg

@@ -25,6 +25,7 @@
     [story]
         [part]
             show_title=yes
+            {TO_HARD_CHOICES}
         [/part]
 
         # wmllint: directory spelling Dionli Legmir El'Isomithir

data/campaigns/Legend_of_Wesmere/scenarios/chapter4/13_News_from_the_Front.cfg

@@ -26,8 +26,8 @@
 
     [story]
         [part]
-            #TODO insert a trackplayer route back to the cliffs of thoria
             story= _ "With Crelanu’s book in hand, Kalenz and his band began the long journey south to the Ka’lian..."
+            {TO_NEWS_FROM_THE_FRONT}
         [/part]
     [/story]