Version number on some platforms wrong

[MathJud]

The version number on the about page is not correct on the following platforms:

• iOS: 2.0.0
• macOS: 2.0.0
• Windows: 1.0.0

Suggestions on how to fix that:

A) We could get the version number via RPC from libqaul B) on Mac & iOS, we could set a different marketing version, which relates to the C) We have two different version numbers: one for the UI and for libqaul

I'm favouring solution A

[MathJud]

[MathJud]