Micro bug: Sketcher Snell constraint lacks reference value botton

[jruiz]

In Sketcher, the dialog box appearing when the restriction of Snell's law is imposed lacks the reference value button.

OS: Ubuntu 18.04.3 LTS
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.3.
Build type: Release
Python version: 3.6.8
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0

[chrisb]

I added it to issue #3981. Having expressions here seems extremly sensible, because experimenting with different materials may require to change all ratio values in different places in one go.

[jruiz]

I added it to issue #3981. Having expressions here seems extremly sensible, because experimenting with different materials may require to change all ratio values in different places in one go.

ok.