Comment 43 for bug 170369

The draft proposal is pretty simple.

 * Improve layers/objects user interface and prepare for page support
 * Implement custom layer type 'page' on group elements
 * Add custom attribute 'page dimensions' on group elements.
 * Enforce translation only transformations for 'page' layers.
 * Enforce one page visible at a time (for now)
 * Clean up 'Move to layer' to include move to page.

That should do for a first draft page support.