update multicast loopback handling

dashboard-ui/bower_components/emby-webcomponents/browser.js

@@ -87,6 +87,34 @@
         }
     }
 
+    function hasKeyboard(browser) {
+
+        if (browser.touch) {
+            return true;
+        }
+
+        if (browser.xboxOne) {
+            return true;
+        }
+
+        if (browser.ps4) {
+            return true;
+        }
+
+        if (browser.edgeUwp) {
+            // This is OK for now, but this won't always be true
+            // Should we use this?
+            // https://gist.github.com/wagonli/40d8a31bd0d6f0dd7a5d
+            return true;
+        }
+
+        if (browser.tv) {
+            return true;
+        }
+
+        return false;
+    }
+
     var uaMatch = function (ua) {
         ua = ua.toLowerCase();
 
@@ -178,5 +206,7 @@
         browser.touch = true;
     }
 
+    browser.keyboard = hasKeyboard(browser);
+
     return browser;
 });