Create new Fit relationship with fits that current fit is projected onto (see #90)
Revert "Create new Fit relationship with fits that current fit is projected onto (see #90)"

This reverts commit a2727d5f4750a3f4fff785100fe0ec8eafabf220.
Better way to fix deletion of projection relationships
Refresh active fit upon fit deletion (deleted fit may have been projected)
Fix issue with EFT .cfg importing

(cherry picked from commit d05b78a451ffb194acac881d56f11d0f3a91b991)