Allow RibbonWindow Minimize/Maximize/Close buttns to work in in-browser scenarios

Allow the QAT context menu to be extended

Expose properties to control the BackstageItem.Icon size

Any group or button can be right clicked and added to the Quick Access Toolbar (QAT).

Make Buttons' Image properties of Object type.

Make the gallery resizable

QAT should have overflow

RibbonGroup collection can be populated only w/ buttons from the designer

When the DropDownButton in an ApplicationMenu is clicked, the DropDown area should not be closed (see MS Excel for reference).