Prevail rounding precision in ScaledGraphics operations

This commit ensures all ScaledGraphics operations prevail
rounding precision if multiple scaled layers are used.

Author: akoch-yatta

org.eclipse.draw2d.tests/META-INF/MANIFEST.MF

@@ -13,6 +13,7 @@ Require-Bundle: org.eclipse.core.runtime;bundle-version="[3.2.0,4.0.0)",
  org.eclipse.jface;bundle-version="[3.2.0,4.0.0)",
  org.eclipse.swtbot.swt.finder;bundle-version="[4.2.0,5.0.0)",
  junit-jupiter-api;bundle-version="[5.10.2,6.0.0)",
+ junit-jupiter-params;bundle-version="[5.10.2,6.0.0)",
  junit-platform-suite-api;bundle-version="[1.10.2,2.0.0)",
  org.opentest4j;bundle-version="[1.3.0,2.0.0)"
 Bundle-RequiredExecutionEnvironment: JavaSE-17

org.eclipse.draw2d.tests/src/org/eclipse/draw2d/test/Draw2dTestSuite.java

@@ -61,7 +61,8 @@
 	DirectedGraphLayoutTest.class,
 	ScrollPaneTests.class,
 	LabelTest.class,
-	PrecisionTests.class
+	PrecisionTests.class,
+	ScaledGraphicsTest.class
 })
 public class Draw2dTestSuite {
 }