Save values to json rather then db

Still needs some work to clean up
Disable and remove save value button when in edit mode
Merge branch 'save_values_json'
Remove SQL linked controls. Better to build something in QGIS and just
call that.
Add missing settings file
Use setenv.bat in provision batch file
Remove old sqlite stuff
Fix binding issue with comboboxs with no items
Remove validator to fix bug with MS SQL Driver
Remove debug print in build