Remove global shortcuts when player isn't active

main/shortcuts.js

@@ -1,5 +1,7 @@
 module.exports = {
-  init
+  init,
+  registerPlayerShortcuts,
+  unregisterPlayerShortcuts
 }
 
 var electron = require('electron')
@@ -11,11 +13,17 @@ var menu = require('./menu')
 var windows = require('./windows')
 
 function init () {
-  // Special "media key" for play/pause, available on some keyboards
-  globalShortcut.register('MediaPlayPause', () => windows.main.send('dispatch', 'playPause'))
-
   // ⌘+Shift+F is an alternative fullscreen shortcut to the ones defined in menu.js.
   // Electron does not support multiple accelerators for a single menu item, so this
   // is registered separately here.
   localShortcut.register('CmdOrCtrl+Shift+F', menu.toggleFullScreen)
 }
+
+function registerPlayerShortcuts () {
+  // Special "media key" for play/pause, available on some keyboards
+  globalShortcut.register('MediaPlayPause', () => windows.main.send('dispatch', 'playPause'))
+}
+
+function unregisterPlayerShortcuts () {
+  globalShortcut.unregister('MediaPlayPause')
+}