Blender Git Loki

UI: Reduce Node Contents Jiggling When Moved

This patch just clamps and rounds node contents and socket locations
so they don't appear to jiggle around when you move them. This issue
happens because node sizing and positioning are in floats while text
content must be pixel-aligned.

See D11684 for more details and comparisons.

Differential Revision: https://developer.blender.org/D11684

Reviewed by Julian Eisel