Added Cutscene and Minimal Cutscene themes from After the Storm

These were added with permission from shadowm, and were copied verbatim save for a small tweak to
the position of the menu button in the cutscene theme to get rid of the 3 pixel offset on the left
which had been corrected a few releases back in the default theme.

changelog

@@ -63,12 +63,13 @@ Version 1.13.7+dev:
    * Fixed bug that allows you to use the minimap to bypass view locking
    * You can now change the theme (in preferences) while a game is in progress.
    * Fixed units moving after in game help exit. (#24644)
-   * Fixed a bug that caused rapid announce messages to overlap eachother. (bug #21634)
+   * Fixed a bug that caused rapid announce messages to overlap each other. (bug #21634)
    * Fix buttons disappearing while menus are open.
    * Fix map labels disappearing when a dialog is open.
    * Improve tooltip placement.
    * Move recruit/recall to top of context menu
    * Add a hotkey to launch test scenarios from the titlescreen
+   * Added a Cutscene and Minimal Cutscene theme for UMC authors to use.
  * WML Engine:
    * Add base_income key to [store_side]
    * Fix issues with alpha animations on hidden units (#14503)

data/themes/_initial.cfg

@@ -12,6 +12,15 @@
     [/main_map_border]
 #enddef
 
+# TODO: cutscene themes aren't meant to have a border
+#define CUTSCENE_THEME_BACKGROUND
+    [main_map_border]
+        border_size = 0.5
+        background_image = "terrain/off-map/background.png~CS(-255,-255,-255)"
+        tile_image = "alphamask.png"
+    [/main_map_border]
+#enddef
+
 #define STATUS_BOX_BORDERLESS X1 Y1 X2 Y2 ID REF XANCHOR YANCHOR
     [panel]
         id={ID}-box-topleft

data/themes/cutscene-minimal.cfg

@@ -0,0 +1,52 @@
+#textdomain wesnoth
+
+[theme]
+    id=Cutscene_Minimal
+    hidden=yes
+
+    [resolution]
+        id=1024x768
+        width=1024
+        height=768
+
+        [screen]
+            id=screen
+            rect="0,0,1024,768"
+        [/screen]
+
+        [main_map]
+            id=main-map
+            rect="0,0,1024,768"
+            xanchor=left
+            yanchor=top
+        [/main_map]
+
+        {CUTSCENE_THEME_BACKGROUND}
+
+        [menu]
+            is_context_menu=true
+            items=describeunit,endturn,quit
+        [/menu]
+    [/resolution]
+
+    [partialresolution]
+        id=1024x600
+        inherits=1024x768
+        width=1024
+        height=600
+    [/partialresolution]
+
+    [partialresolution]
+        id=800x600
+        inherits=1024x600
+        width=800
+        height=600
+    [/partialresolution]
+
+    [partialresolution]
+        id=800x480
+        inherits=800x600
+        width=800
+        height=480
+    [/partialresolution]
+[/theme]

data/themes/cutscene.cfg

@@ -0,0 +1,83 @@
+#textdomain wesnoth
+
+[theme]
+    id=Cutscene
+    hidden=yes
+
+    [resolution]
+        id=1024x768
+        width=1024
+        height=768
+
+        [screen]
+            id=screen
+            rect="0,0,1024,768"
+        [/screen]
+
+        [panel]
+            id=top-panel
+            image=themes/classic/menubar.png
+            ref=screen
+            rect="=,=,=,+26"
+            xanchor=top
+            yanchor=fixed
+        [/panel]
+
+        [main_map]
+            id=main-map
+            rect="=,+0,1024,768"
+            xanchor=left
+            yanchor=top
+        [/main_map]
+
+        {CUTSCENE_THEME_BACKGROUND}
+
+        [menu]
+            id=menu-main
+            title= _ "Menu"
+            image=button_menu/menu_button_copper_H20
+            items=load,preferences,help,quit
+            ref=top-panel
+            rect="=,=+1,+100,=-4"
+            xanchor=fixed
+            yanchor=fixed
+        [/menu]
+
+        [menu]
+            is_context_menu=true
+            items=wml,describeunit,endturn
+        [/menu]
+
+        [action]
+            id=button-endturn
+            title=  _ "End Turn"
+            title2= _ "End Scenario"
+            items=endturn
+            ref=screen
+            rect="-110,=+1,+80,="
+            xanchor=right
+            yanchor=fixed
+        [/action]
+    [/resolution]
+
+    [partialresolution]
+        id=1024x600
+        inherits=1024x768
+        width=1024
+        height=600
+    [/partialresolution]
+
+    [partialresolution]
+        id=800x600
+        inherits=1024x600
+        width=800
+        height=600
+    [/partialresolution]
+
+    [partialresolution]
+        id=800x480
+        inherits=800x600
+        width=800
+        height=480
+    [/partialresolution]
+[/theme]