Code cleanup :

Remove old unused trial pages
Provided TODO comment for baselineTraitDetails
Moved trial-settings-manager.js to more appropriate folder

Post commit code review : Daniel Jao
Fix so that PI_NAME(among others) is not removed from the variable selection list when it has already been selected.

GCP-9786

Post commit code review : Daniel Jao
Merge branch 'branch_maintain_germplasm' of https://github.com/digitalabs/Fieldbook into branch_maintain_germplasm