Fix to make labels for the Permissions radio buttons on the Plan Share tab clickable.
Fix to make labels for the Permissions radio buttons on the Plan
Share tab clickable.

All the Write Plan sections seen to have clickable labels for radio
buttons and checkboxes.

Change:
- renamed the f.label helper method object to match id added to
f.radio_button helper.

Fix for issue #1656.

CDLUC3/dmptool,CDLUC3/dmptool,DMPRoadmap/roadmap,DMPRoadmap/roadmap,DigitalCurationCentre/roadmap,DigitalCurationCentre/roadmap,DMPRoadmap/roadmap,CDLUC3/dmptool,CDLUC3/dmptool,DigitalCurationCentre/roadmap