Read constant values every time in Unity editor to allow runtime tweaking

[Christian Oeing]

Right now the constant values are read only once on initialization to save performance. But in Unity Editor it would be helpful to read them every time, so the user can make changes in the inspector.

[Christian Oeing]

Checking the value for equality each frame when in editor, so it is possible to change it in the inspector.

[Christian Oeing]

Removing milestone: 1.0.13 (automated comment)