Add option to disable MS Store app results in Windows Search (#509)

This also includes:

* Update README for DisableSearchHighlights and DisableFindMyDevice

* Extracted more logic from main script into separate scripts

* Add event handler for tab changes to regenerate overview

DefaultSettings.json

@@ -25,6 +25,10 @@
             "Name": "DisableBing",
             "Value": true
         },
+        {
+            "Name": "DisableStoreSearchSuggestions",
+            "Value": true
+        },
         {
             "Name": "DisableSearchHighlights",
             "Value": true