tips: add tip to recall units instead of recruiting them if costs > 20

changelog

@@ -165,6 +165,7 @@ Version 1.13.5+dev:
    * Fixed bug that icons of buttons under the minimap disappeared when the
      player opened and closed a menu.
    * Correct unit recall count in statistics when undoing a unit recall (bug #25060)
+   * Add tip to recall units instead of recruiting them if costs exceed 20 gold (recruitment costs)
 
 Version 1.13.5:
  * Campaigns:

data/tips.cfg

@@ -244,6 +244,10 @@
     text= _ "If your forces have weak defenses everywhere on the map, occupy the areas where your enemies can only attack you by sharing the same disadvantages. Avoid places where your defenses are poor and your enemy’s are merely average. Plan for heavy losses, and take firm control of any hex where the land does favor you."
     source= _ "<i>― Lord Hamel of Knalga</i>"
 [/tip]
+[tip]
+    text= _  "The recruitment cost of some units may exceed the usual recall expenditure of 20 gold. In a campaign, always check if recalling a unit of the same type may be cheaper."
+    source= _ "<i>― The Wesnoth Tactical Guide</i>"
+[/tip]
 #ifdef __UNUSED__
 [tip]
     text= _ "<i>Feral</i> units, such as Bats and wild animals, will avoid villages. Even if they occupy a village hex, they do not gain any defensive benefits from the village, although they will still be healed."

players_changelog

@@ -42,6 +42,7 @@ Version 1.13.5+dev:
    * Show correct number of attacks in case of swarm weapon special (bug #24978)
    * Fixed bug that icons of buttons under the minimap disappeared when the player opened
      and closed a menu.
+   * Add tip to, if possible, recall units that cost more than 20 gold (recruitment costs), instead of recruiting them
 
 Version 1.13.5:
  * Campaigns: