Restore logic to convert .gen model files on NERSC

See merge request cmb/plugins/ace3p-extensions!16

* Broken in commit ca746113 (21-Feb-2021)
* Separately, add 1 final check to TestExportProject

Cleanup project-releated code

See merge request cmb/plugins/ace3p-extensions!15

Still won't compile on windows for me

Update for new smtk::project implementation

See merge request cmb/plugins/ace3p-extensions!14

Fixes exception on macos program exit

* For testing if girder_client and python requests are installed
  in modelbuilder's python environment.
* Does not require logging into a NERSC account.

* Move menu logic for export from reaction to behavior class.
* Update export spec to set LockType "Read" on the project,
  otherwise smtk will mark it modified.
* Add back check for warnings when export completed.
* Take out dead code.

Sometimes view component contents are empty. Has only been
observed in optimized builds. Needs more investigation, but
can workaround for now.

instead of crashing modelbuilder

Also turn off resource panel display of projects

Clang format changes too

Move implementation including signal to behavior class