Updated code for proper operation of delete folder command

GCP-9015

Post commit code review : Dan Jao
Made labels and current field value dynamic based on user selection on tree

GCP-9015

Post commit code review : Dan Jao
Removed inclusion of studyTreeManagerNurseryOperation.html, as it is no longer used with the single dialog paradigm

GCP-9015

Post commit code review : Dan Jao
Added logic to hide other currently visible divs when new operation is selected.

Factored the folder tree operations out of fieldbook-common.js into a separate script file

GCP-9015

Post commit code review : Dan Jao
Added globals to resolve some JSHint reported errors

GCP-9015

Post commit code review : Dan Jao
Implemented the "single dialog" idea to the germplasm tree
Restored to modal dialog boxes the delete operation

GCP-9105

Post commit code review : Cyrus Venn Casada
markup and css fix for add/edit folder
Incorporate UI fixes to germplasm list tree

GCP-9015

Post commit code review : Cyrus Venn Casada
Updating the branch to include changes from master
Fixed display issues found after merging

GCP-9015

Post commit code review : Cyrus Venn Casada
Introduce implementation of single dialog
Changed modal implementation of add and rename to hidden divs

GCP-9015
Code review : Cyrus Venn Casada