Make it possible to pass primitive-typed arguments to pages and snippets

Currently it is not possible to pass primitive-type parameters to snippets and pages. In my application I have a use case where I want to retrieve data for a datagrid by a certain Id. The datagrid overview is needed in several pages, and the container object is not the same in every page. As of Mendix 10.12 it is possible to pass on primitive parameters to datasource microflows, but by not allowing to pass on primitive parameters to UI elements this doesn't really help me reusing the UI. It would be really nice if I can simply pass on a string parameter to a snippet that contains my datagrid so I can reuse both my data source microflow and my UI.