Tell Your DotNetNuke Module Setting Page To Load Module.css

By default, module.css does not get loaded for a module's setting page.  To let it load the file, add the following code (in C#) to your module setting code behind file (settings.ascx.cs):

protected void Page_Load( object sender, System.EventArgs e ) {
    DotNetNuke.Framework.CDefault DefaultPage = (DotNetNuke.Framework.CDefault)Page;
    DefaultPage.AddStyleSheet( "ModuleSettingStyles", string.Format( "{0}/module.css", this.ModulePath ), true );