Hide zoom options that are not useful

[angievig]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[ ] Feature request
[ ] Documentation issue or request
[X ] Improvement request
[ ] Support request => Please do not submit support request here

Current behavior

When the user selects the options Page, Width, Actual, the canvas is resized, but it's not possible to access to the rest of the model

Expected behavior

Not to offer these options because they don't allow the edition/reading of the model

Minimal reproduction of the problem with instructions

What is the motivation / use case for changing the behavior?

Environment

Variamos version: 1.0.1.20b

For Tooling issues:
Platform: Mac
Others: none