Modify profile_polyline if it already exists.
Disable js minimisation.

This reverts commit 5341e07ecd3dc1e31ce67508fb11772f97a5357d.
Revert "Disable js minimisation."

This reverts commit a61122316c5b217e09d6459d18ce3c270be3da9e.
Merge pull request #48 from BritishAmateurTelevisionClub/dev

Edit existing profile polyline instead of creating a new one.