Use the new ModelRenderer synchronization when changing semantic zoom
Draw a simplified box/text on very low scales
Make zooming have larger steps
Remove unnecessary header
Add a switch to enable/disable automatic semantic zoom in PositionLayout

It is disabled by default.
Make items sensitive to zoom have a normal update when the scale changes
Show the old name overlays

For now
Disable header scaling for VProject and remove it for VModule

This is necessary due to performance concerns.
Make the optimized rendering of tiny text better