Landscape setting for diagram sizes (#471)

Dusan,

An annoying feature of SIM is the inability to select Landscape for a particular paper size, then use show paper size I can arrange diagrams to fit onto a single sheet of paper and avoid page breaks inthe middle of a diagram element.

I can use the Custom Size option to input a paper size withe the height and width reversed, and this works fine, but SIM does not remember the custom settings for a diagram.

Therefore I would suggest either:

1. Have a Landscape/Portrait option for the Paper Sizes menu

or

2. Store custom paper size with the diagram

which ever is easier to implement.

I have just upgraded to Version 10 to check how it handled this, but I get an exception when trying (bug report submitted).