Set an element's label based on a document property

It is now possible to have an element's label in the ribbon display a value of a particular document property. This can be useful in cases where a version number needs to be displayed in the ribbon for example. Currently, only labels for the following elements are supported: Buttons, CheckBoxes, and Static Menus. 

The element needs to be defined as follows:

label="BaseExtenstions:any" label-type="docprop" label-key="docpropname"

The label-type parameter currently only supports docprop (document properties) and in the label-key the name of the document property is inserted. This will set the label to display the value of that particular document property.

Below an example is presented:

<Button label="BaseExtenstions:any" label-type="docprop" label-key="TemplafyTenantID">
    <Cmd ....... />
</Button>