Exposed loading spinner class via a property for the data table.

data-table.js

@@ -287,7 +287,8 @@ class DataTable extends IgniteElement {
             secondaryPageButtonClass: "btn text-center flex-grow-1 btn-secondary",
             refresh: null,
             pendingFilter: null,
-            loading: false
+            loading: false,
+            loadingSpinnerClass: "spinner-border"
         }
     }
 
@@ -385,7 +386,7 @@ class DataTable extends IgniteElement {
 
                 //Loading spinner
                 new div().show(this.loading).class("d-flex justify-content-center mt-3").child(
-                    new div().class("spinner-border")
+                    new div().class(this.loadingSpinnerClass)
                 )
             ),