Bug 94674 [Preferences] Preferences dialog separator under Title for pages does not stretch all the way across
The separator under the Header title for a preference page should stretch from the border of the sash to the far right with no margins in between.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
protected void handleSave() {
		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 IPersistentPreferenceStore) {
					try {
						((IPersistentPreferenceStore) 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