[470844]MeshAppState floating point equality checking repaired

Merged Eclipse Webmaster requested to merge github/fork/SmithRWORNL/Bug470844 into master

Created by: SmithRWORNL

MeshAppState no longer directly tests for the equality of two floating point numbers. It instead properly takes the absolute value of their difference and compares it to a small delta value.

Bug: 470844 https://bugs.eclipse.org/bugs/show_bug.cgi?id=470844 Signed-off-by: Robert Smith SmithRW@ornl.gov

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