Standardized all campaigns on having 350x350px images...

...as their campaign image, and also being ONLY campaign portraits,
never montaged/combined with other portraits, always just one
stand-alone portrait.  Kitty, TSI and I all agreed this looks much
better than before.  The sceptre of fire's image does get pushed down
by its text, but the image is an old ugly portrait anyways, so it's
considered a tolerable issue in order to get this standardization
done.

data/campaigns/An_Orcish_Incursion/_main.cfg

@@ -7,7 +7,7 @@
 [campaign]
     id=An_Orcish_Incursion
     icon="units/elves-wood/lord.png~TC(1,magenta)"
-    image="portraits/elves/lord.png"
+    image="data/campaigns/An_Orcish_Incursion/images/campaign_image.png"
     name= _ "An Orcish Incursion"
     abbrev= _ "AOI"
     rank=15

data/campaigns/Delfadors_Memoirs/_main.cfg

@@ -26,7 +26,7 @@
     abbrev=_ "DM"
     rank=160
     icon="units/human-magi/elder-mage.png~RC(magenta>red)"
-    image="data/campaigns/Delfadors_Memoirs/images/young_delfador.png"
+    image="data/campaigns/Delfadors_Memoirs/images/campaign_image.png"
     first_scenario=01_overture
     difficulties=EASY,NORMAL,HARD
     difficulty_descriptions={MENU_IMG_TXT "data/core/images/units/human-magi/mage.png~RC(magenta>red)" _"Apprentice=(easiest)"} +

data/campaigns/Descent_Into_Darkness/_main.cfg

@@ -8,6 +8,7 @@
     id=Descent_Into_Darkness
     rank=150
     icon="data/campaigns/Descent_Into_Darkness/images/units/dark-mage.png~RC(magenta>red)"
+    image="data/campaigns/Descent_Into_Darkness/images/campaign_image.png"
     name= _ "Descent Into Darkness"
     abbrev= _ "DID"
     define=CAMPAIGN_DESCENT
@@ -20,7 +21,6 @@
 
 " + _"(Intermediate level, 11 scenarios.)
 "
-    image="data/campaigns/Descent_Into_Darkness/images/portraits/malyoung.png"
 
     [about]
         title = _ "Campaign Design"

data/campaigns/Sceptre_of_Fire/_main.cfg

@@ -7,6 +7,7 @@
 [campaign]
     id=Sceptre_of_Fire
     icon="items/sceptre-of-fire.png"
+    image="data/campaigns/Sceptre_of_Fire/images/campaign_image.png"
     name= _ "The Sceptre of Fire"
     abbrev= _ "SoF"
     rank=215
@@ -27,7 +28,6 @@ And of the makers of the same,
 Their tale I now relate...
 
 " + _"(Expert level, 9 scenarios.)"
-    image="items/sceptre-of-fire.png"
 
     [about]
         title = _ "Campaign Design"

data/campaigns/The_Hammer_of_Thursagan/_main.cfg

@@ -8,6 +8,7 @@
     id=The_Hammer_of_Thursagan
     icon="items/hammer-runic.png"
     name= _ "The Hammer of Thursagan"
+    image="data/campaigns/The_Hammer_of_Thursagan/images/campaign_image.png"
     abbrev= _ "THoT"
     rank=140
     define="CAMPAIGN_HAMMER_THURSAGAN"
@@ -20,7 +21,6 @@
     description= _ "In the first years of the Northern Alliance, an expedition from Knalga seeks out their kin at Kal Kartha and to learn the fate of the legendary Hammer of Thursagan. The perils of their journey through the wild Northern Lands, though great, pale beside the evil they will face at its end.
 
 " + _"(Intermediate level, 13 scenarios.)"
-    image="items/hammer-runic.png"
 
     [about]
         title = _ "Author"

data/campaigns/The_South_Guard/_main.cfg

@@ -13,7 +13,7 @@
     rank=20
 
     icon="data/campaigns/The_South_Guard/images/deoran/horseman-commander-defend.png"
-    image="data/campaigns/The_South_Guard/images/portraits/deoran.png"
+    image="data/campaigns/The_South_Guard/images/campaign_image.png"
     description= _ "A young Knight, Deoran, is dispatched to take command of the South Guard... Note: This campaign is designed as an introduction to Wesnoth. The 'Civilian' difficulty level is aimed at first-time players.
 
 " + _"(Novice level, 8 or 9 scenarios depending on the branch you take.)"

data/campaigns/Under_the_Burning_Suns/_main.cfg

@@ -11,6 +11,7 @@
 [campaign]
     id=Under_the_Burning_Suns
     icon="data/campaigns/Under_the_Burning_Suns/images/units/elves-desert/kaleh.png"
+    image="data/campaigns/Under_the_Burning_Suns/images/campaign_image.png"
     name= _ "Under the Burning Suns"
     abbrev= _ "UtBS"
     rank=250
@@ -25,7 +26,6 @@
 
 " + _"(Expert level, 11 scenarios.)
 "
-    image="data/campaigns/Under_the_Burning_Suns/images/misc/UtBS_title.jpg"
 
     # UTBS credits
     [about]