Update engine to playtest-20200303.

Author: pchote

mod.config

@@ -9,7 +9,7 @@
 MOD_ID="example"
 
 # The OpenRA engine version to use for this project.
-ENGINE_VERSION="release-20200202"
+ENGINE_VERSION="playtest-20200303"
 
 # .dll filenames compiled by the mod solution for use by the runtime assembly check
 WHITELISTED_MOD_ASSEMBLIES="OpenRA.Mods.Example.dll"

mods/example/bits/dialog.png

@@ -1,32 +1,11 @@
-button: dialog.png
-	background: 1,1,126,126
-	border-r: 127,1,1,126
-	border-l: 0,1,1,126
-	border-b: 1,127,126,1
-	border-t: 1,0,126,1
-	corner-tl: 0,0,1,1
-	corner-tr: 127,0,1,1
-	corner-bl: 0,127,1,1
-	corner-br: 127,127,1,1
+button:
+	Image: dialog.png
+	PanelRegion: 1, 1, 2, 2, 122, 122, 2, 2
 
-button-hover: dialog.png
-	background: 1,129,126,126
-	border-r: 127,129,1,126
-	border-l: 0,129,1,126
-	border-b: 1,255,126,1
-	border-t: 1,128,126,1
-	corner-tl: 0,128,1,1
-	corner-tr: 126,128,1,1
-	corner-bl: 1,255,1,1
-	corner-br: 127,255,1,1
+button-hover:
+	Image: dialog.png
+	PanelRegion: 1, 129, 2, 2, 122, 122, 2, 2
 
-button-pressed: dialog.png
-	background: 129,1,126,126
-	border-r: 255,1,1,126
-	border-l: 128,1,1,126
-	border-b: 129,127,126,1
-	border-t: 129,0,126,1
-	corner-tl: 128,0,1,1
-	corner-tr: 255,0,1,1
-	corner-bl: 128,127,1,1
-	corner-br: 255,127,1,1
+button-pressed:
+	Image: dialog.png
+	PanelRegion: 129, 1, 2, 2, 122, 122, 2, 2