Bug 25419 [Dialogs] Can't Maximize Window: "Preferences"
Build: 200210181211 The "Preferences" window cannot be maximized since it neither has a maximize title bar button nor does the title bar respond to being double-clicked. The only work around is to reside the window manually by dragging the border. For short-lived windows this is too detail-oriented and time-consuming.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
Iterator nodes = preferenceManager.getElements(PreferenceManager.PRE_ORDER).iterator();
	while (nodes.hasNext()) {
		IPreferenceNode node = (IPreferenceNode) nodes.next();
		IPreferencePage page = node.getPage();
		if (page instanceof PreferencePage) {
			
			IPreferenceStore store =  ((PreferencePage)page).getPreferenceStore();	
			if (store != null 
				&& store.needsSaving()
				&& store instanceof PreferenceStore) {
					try {
						((PreferenceStore)store).save();
					} catch(IOException e) {
						MessageDialog.openError(
							getShell(), 
							JFaceResources.getString("PreferenceDialog.saveErrorTitle"), 
							JFaceResources.format("PreferenceDialog.saveErrorMessage", new Object[] {page.getTitle(), e.getMessage()})); 
					}
			}
		}
	}
}
/**
 * Notifies that the window's close button was pressed, 
 * the close menu was selected, or the ESCAPE key pressed.
 * <p>
 * The default implementation of this framework method
 * sets the window's return code to <code>CANCEL</code>
 * and closes the window using <code>close</code>.
 * Subclasses may extend or reimplement.