Device manager - tweak string formatting of default device name (#23457)

* tweak string formatting of default device name

* cheaters path to beating quality gate

* more electronplatform test coverage

* remove test that throw errors

* cover some more window.electrons

* more coverage

* empty line

src/vector/platform/WebPlatform.ts

@@ -210,7 +210,7 @@ export default class WebPlatform extends VectorBasePlatform {
         let osName = ua.getOS().name || "unknown OS";
         // Stylise the value from the parser to match Apple's current branding.
         if (osName === "Mac OS") osName = "macOS";
-        return _t('%(appName)s (%(browserName)s, %(osName)s)', {
+        return _t('%(appName)s: %(browserName)s on %(osName)s', {
             appName,
             browserName,
             osName,