fix(extensions): Row Detail not always refreshing w/customId, fixes #546

[ghiscoding]

• refresh of each row detail not happening correctly with "datasetIdPropName", this was due to the fact that the View is saved as a "CreatedView" interface and that is kept with "id" not with "datasetIdPropName"
• found out that I made a mistake when adding the datasetIdPropName, I keep the View with an id not with the dynamic datasetIdPropName and so I was keeping all the Views with undefined instead of their correct associated id (or custom id)... long story short, the refresh of each Row Detail wasn't working correctly with using a custom Id with datasetIdPropName
• fixes #546

[codecov]

Codecov Report

Merging #550 into master will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##            master      #550    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          148       148            
  Lines         9717      9717            
  Branches      3273      3412   +139     
==========================================
  Hits          9717      9717            

Impacted Files	Coverage Δ
...lar-slickgrid/extensions/rowDetailViewExtension.ts	100.00% <100.00%> (ø)

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