[Win32] Enable monitor-specific scaling by default

The monitor-specific UI scaling on Windows is disabled by default and
can be activated via a preference.

This change inverts the default enablement: it enables the feature by
default and allows to disable it via preference. The existing
experimental preference is renamed to reset the configuration for every
consumer. All information about the feature being experimental is
removed.

Author: HeikoKlare

bundles/org.eclipse.ui.workbench/.settings/.api_filters

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<component id="org.eclipse.ui.workbench" version="2">
+    <resource path="eclipseui/org/eclipse/ui/IWorkbenchPreferenceConstants.java" type="org.eclipse.ui.IWorkbenchPreferenceConstants">
+        <filter id="388194388">
+            <message_arguments>
+                <message_argument value="org.eclipse.ui.IWorkbenchPreferenceConstants"/>
+                <message_argument value="RESCALING_AT_RUNTIME"/>
+                <message_argument value="RESCALING_AT_RUNTIME"/>
+            </message_arguments>
+        </filter>
+    </resource>
+</component>

bundles/org.eclipse.ui.workbench/eclipseui/org/eclipse/ui/IWorkbenchPreferenceConstants.java

@@ -722,11 +722,10 @@ public interface IWorkbenchPreferenceConstants {
 
 	/**
 	 * <p>
-	 * <strong>EXPERIMENTAL</strong>. Whether the UI adapts to DPI changes at
-	 * runtime. It only effects Windows.
+	 * Whether the UI adapts to DPI changes at runtime. It only effects Windows.
 	 * </p>
 	 *
 	 * @since 3.134
 	 */
-	String RESCALING_AT_RUNTIME = "RESCALING_AT_RUNTIME"; //$NON-NLS-1$
+	String RESCALING_AT_RUNTIME = "monitorSpecificScaling"; //$NON-NLS-1$
 }

bundles/org.eclipse.ui.workbench/eclipseui/org/eclipse/ui/internal/Workbench.java

@@ -691,7 +691,7 @@ private static void setRescaleAtRuntimePropertyFromPreference() {
 			));
 		} else {
 			boolean rescaleAtRuntime = ConfigurationScope.INSTANCE.getNode(WorkbenchPlugin.PI_WORKBENCH)
-					.getBoolean(IWorkbenchPreferenceConstants.RESCALING_AT_RUNTIME, false);
+					.getBoolean(IWorkbenchPreferenceConstants.RESCALING_AT_RUNTIME, true);
 			System.setProperty(SWT_RESCALE_AT_RUNTIME_PROPERTY, Boolean.toString(rescaleAtRuntime));
 		}
 	}