Sync changelog from 1.16 branch

[ci skip]

changelog.md

@@ -44,28 +44,42 @@
    * Fix the engine exiting immediately due to a corrupt .mo file (issue #6194)
    * Removed support for writing BMP screenshots (PR #6206).
 
-## Version 1.15.18+dev
+## Version 1.16.0+dev
  ### Add-ons client
  ### Add-ons server
+   * Fixed `core=` attribute in _server.pbl being completely ignored (issue #5664).
+ ### Campaigns
+   * Tutorial
+     * Use a portrait on the Campaigns menu.
+ ### Editor
+ ### Multiplayer
+ ### Lua API
+ ### Packaging
+ ### Terrain
+ ### Translations
+   * Updated translations: Italian.
+ ### Units
+ ### User interface
+   * Made the Add-ons Manager search box less unwieldy on very small resolutions.
+ ### WML Engine
+ ### Miscellaneous and Bug Fixes
+
+## Version 1.16.0
  ### Campaigns
    * Sceptre of Fire
      * S06: Fix some WML variable handling causing autodefeat in S06 or rune-equip bugs in a later scenario (issue #6146)
    * Under the Burning Suns
      * S05: Avoid village just taken by the player being re-assigned to the enemy (issue #6187)
- ### Editor
- ### Multiplayer
  ### Lua API
    * Fixed `wesnoth.audio.volume = N` always setting volume to 0.
- ### Packaging
- ### Terrain
  ### Translations
-   * Updated translations: British English, Czech, Italian, Japanese, Portuguese (Brazil), Spanish.
- ### Units
+   * Updated translations: British English, Czech, Finnish, Italian, Japanese, Portuguese (Brazil), Spanish.
  ### User interface
    * Don't display the locale API identifier on the Language button (issue #6205).
- ### WML Engine
  ### Miscellaneous and Bug Fixes
    * Fix the engine exiting immediately due to a corrupt .mo file (issue #6194)
+   * When showing [message] with [options] but no default, highlight the first one (issue #6038)
+   * Ensure that [modify_unit] has some expected side-effects of unstoring a unit (issues #4978 and #5133)
 
 ## Version 1.15.18
  ### Campaigns