Merge branch 'dev-mh-assign' into 'master'

Implement/improve mesh assignment/copying

See merge request !56
9 jobs for master in 3 minutes and 42 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #74835
VS2015
VS2015-32-bit

00:01:15

passed #74834
VS2015
VS2015-64-bit

00:01:23

passed #74833
VS2017
VS2017-32-bit

00:01:16

passed #74832
VS2015
VS2017-64-bit

00:01:33

passed #74829
Linux
clang-c++11

00:03:42

passed #74831
Linux
cppcheck

00:00:26

passed #74836
Linux
doc

00:00:16

passed #74828
Linux
gcc-c++11

00:02:57

passed #74830
Apple
macos-c++11

00:02:54