[HDRP][Compositor] Add tooltips with the full name of compositor properties that otherwi… #1490
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Purpose of this PR
https://fogbugz.unity3d.com/f/cases/1263590/
The graphics compositor is using the reference names of the shader graph properties as they are defined in the Shader Graph Inspector:
Since the property name set in ShaderGraph can be arbitrarily big, the compositor UI will have to clip it at some point. Note that ShaderGraph also clips the name.
This PR now shows a tooltip with the full name when the user hovers (and waits a bit) over a property name, so he can see the names of properties that don't fit otherwise in the UI.

Testing status
As shown in the screenshots, clipping of large names still occurs, but now we have tooltips displayingthe full name.
However the user should manually put a shorter name.