cleanup inputs/dbfiles

remove unused file_id (redmine #1519)
better listing/editing of dbfiles
better list of inputs
more cleanup of inputs (redmine #1875)
more cleanup

move files/runs/variables to top to be consistent
fix show/back button to NOT submit form
Merge pull request #36 from PecanProject/cleanup-inputs

Cleanup inputs
Merge branch 'master' into RM-1245-add-parent-to-pft

Conflicts:
	db/schema.rb