Bug 93245 [Dialogs] Error messages show up in two locations in the properties dialog
Force an error message: 1) select a Java project 2) open the properties dialog 3) navigate to Java Compiler>Building 4) enable project specific settings 5) enter a letter into the maximum number of problems field ->the error message shows up at the bottom 6) resize the dialog ->the error message also shows up in the banner
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
}
	/**
	 * Set the treeViewer.
	 * @param treeViewer
	 * 
	 * @since 3.1
	 */
	protected void setTreeViewer(TreeViewer treeViewer) {
		this.treeViewer = treeViewer;
	}
	/**
	 * Get the composite that is showing the page.
	 *
	 * @return Composite.
	 * 
	 * @since 3.1
	 */
	protected Composite getPageContainer() {
		return this.pageContainer;
	}
	/**
	 * Set the composite that is showing the page.
	 * @param pageContainer Composite
	 * 
	 * @since 3.1
	 */
	protected void setPageContainer(Composite pageContainer) {
		this.pageContainer = pageContainer;
	}
	/**