Not sure this looks as it should.

Run the WebOrder demo application and open the oDemoCustomMenus view. Click the "Menu" (hamburger) button. Looks fine with all themes, except for the Material Theme, where it just doesn't look like I'm sure it's meant to (the top of it).

It's more apparent if you increase the width of the floating menu:

        Object oWebMenuButton1 is a cWebMenuButton
            Set piColumnSpan to 2
            Set psCaption to "Menu"
            Set psCSSClass to "WebIcon_Hamburger"
            Set psMenuCSSClass to "WebMenuButton_Arrow"
            Set piMenuWidth to 200
            Set pbMenuShowCaption to False
            Set piColumnIndex to 4