Improve demos for better screenshots, cleanup

orx-gui/src/demo/kotlin/DemoSimple01.kt

@@ -11,6 +11,13 @@ import org.openrndr.shape.Circle
  */
 fun main() = application {
     program {
+        // -- this block is for automation purposes only
+        if (System.getProperty("takeScreenshot") == "true") {
+            extend(SingleScreenshot()) {
+                this.outputFile = System.getProperty("screenshotPath")
+            }
+        }
+
         val gui = GUI()
         gui.compartmentsCollapsedByDefault = false
 
@@ -28,11 +35,6 @@ fun main() = application {
             var radii = mutableListOf(5.0, 6.0, 8.0, 14.0, 20.0, 30.0)
         }
         gui.add(settings)
-        if (System.getProperty("takeScreenshot") == "true") {
-            extend(SingleScreenshot()) {
-                this.outputFile = System.getProperty("screenshotPath")
-            }
-        }
         extend(gui)
         extend {
             drawer.fill = settings.color