Issue #2319331: Empty options not created in option set when creating a variation number lower than the existing number of variations
Include the plugin type for each campaign in settings.
Add control label to settings.
Refactor settings element into its own resuable call.
Continued updating variation default names
Added rename variation function.
Update tests for new variation default name.
Revert "Added rename variation function."

This reverts commit bdca0584b98bc6ffd3a88ba6b82b8797ddb50b03.
Default naming clean-up
Added rename variation function.
Added functions to rename and delete page variations.
Updated variation tests to include rename and delete.
Rename page variation functions for ease of grouping.
Use original index rather than array position for rename/delete