[Amibe] DistanceMetric: fix metric.txt file format for beams

* For beams, before it was size0, d1, d0. Now it's size0, d0, d1 which the same as
point
* Also rewrite point reading with fixed variable names
[mesh-algos] RemeshPanel: disable coplanarity check by default
[mesh-algos] RemeshAction: if a metric.txt file is there, use it.