Added "open downloads folder" button on GUI

app.py

@@ -55,6 +55,10 @@ def loadDownloadQueue(dz, interface=None):
         remove(path.join(getConfigFolder(), 'queue.json'))
         restoreQueue(qd['queue'], qd['queueComplete'], qd['queueList'], dz, interface)
 
+def getDownloadFolder():
+    global settings
+    return settings['downloadLocation']
+
 def get_charts(dz):
     global chartsList
     if len(chartsList) == 0:

server.py

@@ -1,6 +1,7 @@
 #!/usr/env/bin python3
 import logging
 import sys
+import subprocess
 from os import path
 
 from flask import Flask, render_template, request, session
@@ -244,6 +245,16 @@ def update_userArtists():
 def update_userTracks():
     emit('updated_userTracks', app.updateUserTracks(session['dz']))
 
+@socketio.on('openDownloadsFolder')
+def openDownloadsFolder():
+    folder = app.getDownloadFolder()
+    if sys.platform == 'darwin':
+        subprocess.check_call(['open', folder])
+    elif sys.platform == 'linux':
+        subprocess.check_call(['xdg-open', folder])
+    elif sys.platform == 'win32':
+        subprocess.check_call(['explorer', folder])
+
 def run_server(port):
     print("Starting server at http://127.0.0.1:" + str(port))
     socketio.run(server, host='0.0.0.0', port=port)