Pass uv coords directly to GB.Mesh

[juliohm]

Fix #1160

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 1 line in your changes missing coverage. Please review.

Project coverage is 87.79%. Comparing base (5b34c17) to head (e625289).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
ext/grid.jl	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1161   +/-   ##
=======================================
  Coverage   87.79%   87.79%           
=======================================
  Files         193      193           
  Lines        6057     6057           
=======================================
  Hits         5318     5318           
  Misses        739      739           

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