Added jface and swt dependencies for plug-ins that contribute to the UI.

Dependencies aren't added for plug-ins that generate an activator file
or use a template.

Fixes #1306

ui/org.eclipse.pde.ui/src/org/eclipse/pde/internal/ui/wizards/plugin/NewProjectCreationOperation.java

@@ -84,6 +84,7 @@
 import org.eclipse.pde.ui.IFragmentFieldData;
 import org.eclipse.pde.ui.IPluginContentWizard;
 import org.eclipse.pde.ui.IPluginFieldData;
+import org.eclipse.pde.ui.templates.PluginReference;
 import org.eclipse.swt.widgets.Display;
 import org.eclipse.ui.IWorkbenchPage;
 import org.eclipse.ui.IWorkbenchPart;
@@ -553,6 +554,10 @@ private IPluginReference[] getDependencies() {
 		if (fGenerator != null) {
 			IPluginReference[] refs = fGenerator.getDependencies();
 			Collections.addAll(result, refs);
+		} else if (fContentWizard == null && fData instanceof IPluginFieldData pluginData && pluginData.isUIPlugin()) {
+			// a plug-in project is being created and makes contributions to UI
+			result.add(new PluginReference("org.eclipse.swt")); //$NON-NLS-1$
+			result.add(new PluginReference("org.eclipse.jface")); //$NON-NLS-1$
 		}
 
 		if (fContentWizard != null) {