Demos: ensure all use fun main() = application {

- Adjust some demo window sizes.
- Replace Random.double by Double.uniform
- Tweak some demos so screenshots look more interesting

orx-shapes/src/jvmDemo/kotlin/rectify/DemoRectifiedContour03.kt

@@ -7,28 +7,26 @@ import org.openrndr.extra.shapes.hobbycurve.hobbyCurve
 import org.openrndr.extra.shapes.rectify.rectified
 import kotlin.random.Random
 
-fun main() {
-    application {
-        configure {
-            width = 720
-            height = 720
-        }
-        program {
-            val points = drawer.bounds.scatter(80.0, distanceToEdge = 100.0, random = Random(0))
-            val curve = hobbyCurve(points, closed = true)
-            val rectified = curve.rectified()
-            extend {
-                drawer.clear(ColorRGBa.BLACK)
-                drawer.fill = null
-                drawer.stroke = ColorRGBa.GRAY
-                drawer.contour(curve)
-
-                val points = (0 until 100).map {
-                    rectified.position(it/100.0)
-                }
-                drawer.circles(points, 5.0)
+fun main() = application {
+    configure {
+        width = 720
+        height = 720
+    }
+    program {
+        val points = drawer.bounds.scatter(80.0, distanceToEdge = 100.0, random = Random(0))
+        val curve = hobbyCurve(points, closed = true)
+        val rectified = curve.rectified()
+        extend {
+            drawer.clear(ColorRGBa.BLACK)
+            drawer.fill = null
+            drawer.stroke = ColorRGBa.GRAY
+            drawer.contour(curve)
 
+            val points = (0 until 100).map {
+                rectified.position(it / 100.0)
             }
+            drawer.circles(points, 5.0)
+
         }
     }
-}
+}