Fix Add/Update SpineOpt wizard

[ptsavol]

Update SpineInterface before updating SpineOpt.

Fixes spine-tools/SpineOpt.jl#1186

Checklist before merging

• Unit tests pass

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.28%. Comparing base (42adeae) to head (7c522fc).
Report is 13 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3066   +/-   ##
=======================================
  Coverage   67.27%   67.28%           
=======================================
  Files         194      194           
  Lines       37317    37317           
  Branches     4482     4482           
=======================================
+ Hits        25106    25107    +1     
- Misses      10934    10935    +1     
+ Partials     1277     1275    -2     

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