CATROID-1613 Fix ColorDetection ignoring z-index (#5041)

Author: Frajhamster

catroid/src/main/java/org/catrobat/catroid/sensing/ColorAtXYDetection.kt

@@ -186,10 +186,10 @@ class ColorAtXYDetection(
     }
 
     private fun rgbaColorToRGBHexString(color: Color): String =
-        COLOR_HEX_PREFIX + color.toString().substring(RGBA_START_INDEX, RGBA_END_INDEX)
+        COLOR_HEX_PREFIX + color.toString().substring(RGBA_START_INDEX, RGBA_END_INDEX).uppercase()
 
     private fun argbColorToRGBHexString(color: Color): String =
-        COLOR_HEX_PREFIX + color.toString().substring(ARGB_START_INDEX, ARGB_END_INDEX)
+        COLOR_HEX_PREFIX + color.toString().substring(ARGB_START_INDEX, ARGB_END_INDEX).uppercase()
 
     private fun convertStageToBitmapCoordinate(
         position: Int,

catroid/src/main/java/org/catrobat/catroid/sensing/ColorDetection.kt

@@ -85,7 +85,8 @@ abstract class ColorDetection(
     }
 
     private fun drawSprites(lookList: List<Look>, batch: SpriteBatch) {
-        lookList.forEach { it.draw(batch, 1f) }
+        val sortedLookList = lookList.sortedBy { it.zIndex }
+        sortedLookList.forEach { it.draw(batch, 1f) }
     }
 
     protected fun createViewport(