scale / print / print preview

One of the things we need improved the most is scale / print / print preview.

The scale isn't properly saved:
https://github.com/LibreCAD/LibreCAD/issues/592

The scale is only found in the print preview.

Using the print preview is fundamental for printing,
yet there is nothing indicating this to users.

Print preview shows objects as selected:
https://github.com/LibreCAD/LibreCAD/issues/491

The drawing area can only be infinite...
I think it could be useful to allow people to
draw directly onto a representation of the paper like in InkScape.

Printing to PDF requires setting a paper size in Custom Drawing Preferences,
yet there is nothing indicating this to users.

I'm sure there are many others I have forgotten...
needless to say we need someone willing to work in this area.