Add file-input support, upload missing files.
Add (partial) support image buttons.
Reorganize keyboard templates.
Implement typing, deletion.
Render onscreen keyboards (not interactive yet).
Render <select> elements to multi-column menus.
Implement radio inputs, upload missing files, make space for descriptions & richer form controls to use.
Add support for checkboxes, along with supporting infrastructure.
Add infrastructure for rendering Ginger templates.
Assemble testscript as locally-run webserver, adjust namespace.