Aligned enclosure example models and an integrated file browser prototype

Walid and Adam have been working on aligning the example Acumen models for the enclosure interpreter. As part of this, a new series of examples illustrating how events are handled by this interpreter was developed with the help of Jan. To make working with series of examples (and collections of models in general) more convenient, Adam developed a prototype of a file browser integrated into the Acumen main window. When the synchronisation toggle button is pressed, this browser makes it possible to step through models (viewing them in the editor) using the arrow keys of the keyboard. This makes it easy to observe changes between subtly different models.