Standard views

[digitalbirth]

It would be great to be able to select standard views like

• front
• rear
• left
• right
• top
• bottom
• iso

Autodesk uses a cube, solidworks a button for each view

Here is an example of a view cube https://docs.cadexchanger.com/sdk/getting-started-examples-3d-viewer.html

Would be great if say keys control + 1 to 7 changed the views

[kovacsv]

Relates to #67.