Use Pinia store for notifications. WIP, only the last one is shown in the footer.
Add a bar for "job actions", i.e. buttons that do something with the selected job(s). Just has one button, and it doesn't do much either, but at least the framework for these things is here.
Using the concept of 'selected' and 'active' similar to Blender. Not all components have been altered to use the Pinia store yet.