Add MobileExternalBrowser to client config (#28180)

* Add MobileExternalBrowser to client config

* set config MobileExternalBrowser as a pointer

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Co-authored-by: Mattermost Build <build@mattermost.com>

server/config/client.go

@@ -294,6 +294,7 @@ func GenerateLimitedClientConfig(c *model.Config, telemetryID string, license *m
 	props["AppDownloadLink"] = *c.NativeAppSettings.AppDownloadLink
 	props["AndroidAppDownloadLink"] = *c.NativeAppSettings.AndroidAppDownloadLink
 	props["IosAppDownloadLink"] = *c.NativeAppSettings.IosAppDownloadLink
+	props["MobileExternalBrowser"] = strconv.FormatBool(*c.NativeAppSettings.MobileExternalBrowser)
 
 	props["DiagnosticId"] = telemetryID
 	props["TelemetryId"] = telemetryID