translation.json: change_redirect_url and handled undefined in input value

lib/locales/en-US/translation.json

@@ -320,7 +320,7 @@
 		"create_project": "Create Project if no projects have been created.",
 		"create_auth_to_oauth": "\"Create credentials\" -> \"OAuth clientID\"",
 		"select_webapp": "Select \"Web Application\"",
-    "change_redirect_url": "Enter <code>https://${crowi.host}/google/callback</code> <br>(where < code > $ {crowi.host} < /code> is your host name) for \"Authorized redirect URIs\".",
+    "change_redirect_url": "Enter <code>https://${crowi.host}/google/callback</code> <br>(where <code>${crowi.host}</code> is your host name) for \"Authorized redirect URIs\".",
     "clientID": "Client ID",
     "client_secret": "Client Secret",
     "guest_mode": {

lib/views/admin/widget/passport/google-oauth.html

@@ -43,14 +43,14 @@
     <div class="form-group">
       <label for="settingForm[security:passport-google:clientId]" class="col-xs-3 control-label">{{ t("security_setting.clientID") }}</label>
       <div class="col-xs-6">
-        <input class="form-control" type="text" name="settingForm[security:passport-google:clientId]" value="{{ settingForm['security:passport-google:clientId'] }}">
+        <input class="form-control" type="text" name="settingForm[security:passport-google:clientId]" value="{{ settingForm['security:passport-google:clientId'] || '' }}">
       </div>
     </div>
 
     <div class="form-group">
       <label for="settingForm[security:passport-google:clientSecret]" class="col-xs-3 control-label">{{ t("security_setting.client_secret") }}</label>
       <div class="col-xs-6">
-        <input class="form-control" type="text" name="settingForm[security:passport-google:clientSecret]" value="{{ settingForm['security:passport-google:clientSecret'] }}">
+        <input class="form-control" type="text" name="settingForm[security:passport-google:clientSecret]" value="{{ settingForm['security:passport-google:clientSecret'] || '' }}">
       </div>
     </div>
   </fieldset>