[Win32] Remove WebView environment initialization in Edge browser tests

The browser tests contain a setup method that creates and directly
disposes a browser before the first test method when running on Windows.
It was supposed to trigger the Edge environment setup performed when
creating the Edge browser instance. This was originally introduced for
testing purposes because of tests sometimes running into timeouts. On
the contrary, it has a side effect on the first test to be executed, as
there is no proper cleanup like after all other tests is performed after
this initial setup method, e.g., the event loop is not spinned to
process pending events.

This change removes that additional setup/preparation logic. Instead, it
reinitializes the display to establish an isolated, clean state,
independent from previously executed tests in the same JVM.

Author: HeikoKlare

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_browser_Browser.java

@@ -159,12 +159,17 @@ public Test_org_eclipse_swt_browser_Browser(int swtBrowserSettings) {
 }
 
 @BeforeClass
-public static void setupEdgeEnvironment() {
+public static void setupEnvironment() {
+	// Reinitialize the display to start with a clean state
+	Display.getCurrent().dispose();
+	processUiEvents();
+	Display.getDefault();
 	// initialize Edge environment before any test runs to isolate environment setup
 	if (SwtTestUtil.isWindows) {
 		Shell shell = new Shell();
-		new Browser(shell, SWT.EDGE);
+		new Browser(shell, SWT.EDGE).getUrl();
 		shell.dispose();
+		processUiEvents();
 	}
 }