Editing a Running Campaign No Longer Restarts It

We fixed an issue where editing a running or paused campaign could start it again before you were ready.
What was happening
When you edited the sequence of a campaign that was already running or paused, for example to change the wording of a message, the Next button took you back through the campaign setup screens and ended with Start campaign. This made it look as if your changes would only apply once you started the campaign again.
That step was never needed, and it could catch you out. If you had paused a campaign to fix a message, clicking through to the end started it again, so messages could go out before you meant them to.
Now, when you edit a campaign that is running or paused:
- The Next button is now Done, and it takes you straight back to your campaigns.
- Your campaign keeps its status. A running campaign keeps running, and a paused campaign stays paused until you resume it.
- Your changes are saved as you make them. Contacts who reach the edited step from then on get the new version. Messages that were already sent are not changed.
Creating a new campaign or relaunching a finished one is not affected. Those still take you through the setup steps and end with Start campaign.