Add URL params parsing and concept of "embedded mode"

webassets/js/alerts.js

@@ -292,6 +292,11 @@ function loadOptions() {
         })));
         $("#alerts-to-fetch").val(options["web-ui-options"]["alert-count-default"]);
 
+        // Load URL params. These may select things from the various filter & display options, so the function needs
+        // to be called after these are set up, but if the URL params ask for "embedded mode", this will suppress
+        // loading settings, so this needs to be called before that.
+        loadURLParams();
+
         // Load filters from settings storage
         loadSettings();