Unmount audio/video tag when exiting player

src/renderer/pages/player-page.js

@@ -26,6 +26,15 @@ module.exports = class Player extends React.Component {
       </div>
     )
   }
+
+  onComponentWillUnmount () {
+    // Unload the media element so that Chromium stops trying to fetch data
+    const tag = document.querySelector('audio,video')
+    if (!tag) return
+    tag.pause()
+    tag.src = ''
+    tag.load()
+  }
 }
 
 // Handles volume change by wheel