vcmi: convert mysticism to MANA_REGENERATION

With PERCENT_TO_TARGET_TYPE it was easy.

config/heroes/dungeon.json

@@ -160,11 +160,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"mysticism" : {
-					"subtype" : "skill.mysticism",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "MANA_REGENERATION",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}

config/heroes/fortress.json

@@ -168,11 +168,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"mysticism" : {
-					"subtype" : "skill.mysticism",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "MANA_REGENERATION",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}

config/heroes/inferno.json

@@ -173,11 +173,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"mysticism" : {
-					"subtype" : "skill.mysticism",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "MANA_REGENERATION",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}

config/heroes/tower.json

@@ -168,11 +168,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"mysticism" : {
-					"subtype" : "skill.mysticism",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "MANA_REGENERATION",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}

config/skills.json

@@ -225,8 +225,7 @@
 		"base" : {
 			"effects" : {
 				"main" : {
-					"subtype" : "skill.mysticism",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"type" : "MANA_REGENERATION",
 					"valueType" : "BASE_NUMBER"
 				}
 			}

lib/mapObjects/CGHeroInstance.cpp

@@ -903,7 +903,7 @@ si32 CGHeroInstance::manaRegain() const
 	if (hasBonusOfType(Bonus::FULL_MANA_REGENERATION))
 		return manaLimit();
 
-	return valOfBonuses(Bonus::SECONDARY_SKILL_PREMY, SecondarySkill::MYSTICISM) + valOfBonuses(Bonus::MANA_REGENERATION); //1 + Mysticism level
+	return valOfBonuses(Bonus::MANA_REGENERATION);
 }
 
 si32 CGHeroInstance::getManaNewTurn() const