[[ Bug 22605 ]] Standalone settings changes for dark mode launch screens

This patch adds support for dark mode to the storyboard based launch screens
for iOS. Users can now choose dark mode images and to use the system background
color.

Author: montegoulding

Toolset/palettes/standalone settings/revstandalonesettings.8.rev

@@ -150,10 +150,16 @@ on updateSettings
    put computeDefault(tSettings["ios,iPad Pro 12.9 icon"], empty) into field "iPad Pro 12.9 Icon"
    put computeDefault(tSettings["ios,iPad Pro 11 icon"], empty) into field "iPad Pro 11 Icon"
 
-   put computeDefault(tSettings["ios,launch-image-1x"], empty) into field "launch-image-1x"
-   put computeDefault(tSettings["ios,launch-image-2x"], empty) into field "launch-image-2x"
-   put computeDefault(tSettings["ios,launch-image-3x"], empty) into field "launch-image-3x"
-   set the backColor of graphic "launch-backcolor" to computeDefault(tSettings["ios,launch-backcolor"], "0,0,0")
+   put computeDefault(tSettings["ios,launch-image-light-1x"], empty) into field "launch-image-light-1x"
+   put computeDefault(tSettings["ios,launch-image-light-2x"], empty) into field "launch-image-light-2x"
+   put computeDefault(tSettings["ios,launch-image-light-3x"], empty) into field "launch-image-light-3x"
+   put computeDefault(tSettings["ios,launch-image-dark-1x"], empty) into field "launch-image-dark-1x"
+   put computeDefault(tSettings["ios,launch-image-dark-2x"], empty) into field "launch-image-dark-2x"
+   put computeDefault(tSettings["ios,launch-image-dark-3x"], empty) into field "launch-image-dark-3x"
+   
+   set the opaque of graphic "launch-backcolor" to tSettings["ios,launch-backcolor"] is not empty
+   set the hilite of button "Use system background color" to tSettings["ios,launch-backcolor"] is empty
+   set the backColor of graphic "launch-backcolor" to tSettings["ios,launch-backcolor"]
 
    local tProfiles, tProfileIndex
    put empty into tProfileIndex