Enable viewer limits by default

Set default workbench preference for the view limit to 1000, which is
what we believe the most practical value on most platforms to avoid UI
freezes in large viewers.

Note: this limit can also be disabled in products by specifying
`org.eclipse.ui.workbench/largeViewLimit=0` in the
plugin_customization.ini file.

Fixes eclipse-platform#1425

bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/WorkbenchPreferenceInitializer.java

@@ -126,8 +126,8 @@ public void initializeDefaultPreferences() {
 
 		node.putInt(IWorkbenchPreferenceConstants.DISPOSE_CLOSED_BROWSER_HOVER_TIMEOUT, -1);
 
-		// Disable viewer limit configuration until more testing and stabilization.
-		node.putInt(IWorkbenchPreferenceConstants.LARGE_VIEW_LIMIT, 0);
+		// Don't show more than 1000 child elements per parent by default
+		node.putInt(IWorkbenchPreferenceConstants.LARGE_VIEW_LIMIT, 1000);
 
 		node.put(IWorkbenchPreferenceConstants.RESOURCE_RENAME_MODE,
 				IWorkbenchPreferenceConstants.RESOURCE_RENAME_MODE_INLINE);

tests/org.eclipse.ui.tests/Eclipse UI Tests/org/eclipse/ui/tests/preferences/ViewerItemsLimitTest.java

@@ -89,9 +89,8 @@ protected void doSetUp() throws Exception {
 		super.doSetUp();
 		cleanUp();
 		preferenceStore = WorkbenchPlugin.getDefault().getPreferenceStore();
-		// TODO: preference is set to zero, enable once preference is restored
-//		int viewLimit = preferenceStore.getInt(IWorkbenchPreferenceConstants.LARGE_VIEW_LIMIT);
-//		assertEquals("Default viewer limit must be " + DEFAULT_VIEW_LIMIT, DEFAULT_VIEW_LIMIT, viewLimit);
+		int viewLimit = preferenceStore.getInt(IWorkbenchPreferenceConstants.LARGE_VIEW_LIMIT);
+		assertEquals("Default viewer limit must be " + DEFAULT_VIEW_LIMIT, DEFAULT_VIEW_LIMIT, viewLimit);
 		window = getActiveWindow();
 		activePage = window.getActivePage();
 		defaultPerspective = activePage.getPerspective();