[feature request] restore view offsets

[lvmm]

When Archi restores views at startup it positions top left corner of a view at (0,0) and if a diagram in a view is not aligned at (0,0) it may not be fully visible. If there is a way to see the current view offset in the UI, I haven't found it, so maintaining the alignment is not that easy. I'd like Archi to restore view offset at startup or show view offset in the UI so that views can be properly aligned or provide a tool for auto alignment at (0,0).

[Phillipus]

Please provide an implementation via pull request if you want this. Until then, closing.