Removed implicit logic to fallback to own focus key

Author: asgvard

dist/spatialNavigation.js

@@ -612,7 +612,7 @@ var SpatialNavigation = function () {
         return;
       }
 
-      var targetFocusKey = overwriteFocusKey && this.isFocusableComponent(overwriteFocusKey) ? overwriteFocusKey : focusKey;
+      var targetFocusKey = overwriteFocusKey || focusKey;
 
       var newFocusKey = this.getNextFocusKey(targetFocusKey);
 

src/spatialNavigation.js

@@ -533,8 +533,7 @@ class SpatialNavigation {
       return;
     }
 
-    const targetFocusKey = overwriteFocusKey && this.isFocusableComponent(overwriteFocusKey) ?
-      overwriteFocusKey : focusKey;
+    const targetFocusKey = overwriteFocusKey || focusKey;
 
     const newFocusKey = this.getNextFocusKey(targetFocusKey);