redirect back on post feedback

modules/qmining/qmining.js

@@ -108,6 +108,8 @@ app.get('/manual', function (req, res) {
 app.post('/postfeedback', function (req, res) {
   logger.Log('New feedback message', logger.GetColor('bluebg'), true)
   utils.AppendToFile('\n\n' + logger.GetDateString() + ': ' + req.body.message_field, msgFile)
+  res.redirect('back')
+  res.end()
 })
 
 app.get('/lred', function (req, res) {