Setting the Project to use the .NET 4.x support apparently results in the Editor using the OS's Locale for formatting. In case of a non-English Locale this results in a mixed English/non-English Editor experience, specifically noticeable when commas are used for decimal separation.

Steps to reproduce:
1. [Change Locale setting to non-English]
a) Open Control Panel and search for Region.
b) Open the Formats Tab.
c) Select any non-English format, that uses commas instead of dots for decimal separation (for example, German (Germany))
d) Apply, close the window
2. Open attached project
3. Open shader file from ExampleAssets > Shaders > Paint1G_WAnim_Shader
4. Observe the nodes with float values.

Expected behavior: for float values dots are used for decimal separation.
Actual behavior: for float values commas are used for decimal separation.

Reproduced with: 2017.2.0b2, 2017.1.0f3, 2018.2.2f1, 2019.1.0a1.
Not reproduced with: 5.6 (no Experimental .NET 4.6 feature).