I have a project in Unity 2019.4.0f1 and when I double click on a script in the unity editor it opens as expected in Visual Studio 2019. However despite having Unity Tools installed for VS, the class file does not have any intellitext and non of the objects are colour coded etc. It is as if it has simply opened a text file. If I look in solution explorer is shows nothing and says there are no projects. If I look in windows explorer I can see no solution or project files for the Unity Project...