Bug 33550 [Dialogs] Dialog should support remembering size and position
There are several dialogs that remember its size and position. Since restore the size and considering screen size and font changes isn't trivial JFace's Dialog class should support remembering and restoring size and position. These would realy ease the task for subclasses. May be you can steel the code from OpenTypeSelectionDialog.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/ResourceListSelectionDialog.java
* @return <code>true</code> to show derived resources, <code>false</code> to hide them
     * @since 3.1
     */
    protected boolean getShowDerived() {
       return showDerived ; 
    }
    /**
     * Sets whether derived resources should be shown in the list.
     * 
     * @param show <code>true</code> to show derived resources, <code>false</code> to hide them
     * @since 3.1
     */
    protected void setShowDerived(boolean show) {
        showDerived  = show;
    }
    /**
     * Creates a ResourceDescriptor for each IResource,
     * sorts them and removes the duplicated ones.
     * 
     * @param resources resources to create resource descriptors for
     */
    private void initDescriptors(final IResource resources[]) {
        BusyIndicator.showWhile(null, new Runnable() {
            public void run() {
                descriptors = new ResourceDescriptor[resources.length];
                for (int i = 0; i < resources.length; i++) {
                    IResource r = resources[i];
                    ResourceDescriptor d = new ResourceDescriptor();
                    
                    d.label = r.getName();