Show filename in window title. Fix #245

Also fix error popover z index

renderer/index.css

@@ -741,6 +741,7 @@ body.drag .torrent-placeholder span {
   margin: 0;
   width: 100%;
   overflow: hidden;
+  z-index: 1;
 }
 
 .app.hide-header .error-popover {

renderer/index.js

@@ -767,7 +767,7 @@ function openPlayer (infoHash, index, cb) {
     if (timedOut) return update()
 
     // otherwise, play the video
-    state.window.title = torrentSummary.name
+    state.window.title = torrentSummary.files[state.playing.fileIndex].name
     update()
 
     ipcRenderer.send('onPlayerOpen')

renderer/lib/dispatcher.js

@@ -4,9 +4,9 @@ module.exports = {
   dispatcher
 }
 
-// _memoize most of our event handlers, which are functions in the form
+// Memoize most of our event handlers, which are functions in the form
 // () => dispatch(<args>)
-// ... this prevents virtual-dom from updating tons of listeners on every update()
+// ... this prevents virtual-dom from updating every listener on every update()
 var _dispatchers = {}
 var _dispatch = () => {}
 

renderer/state.js

@@ -30,6 +30,7 @@ module.exports = {
     isPaused: true,
     mouseStationarySince: 0 /* Unix time in ms */
   },
+  audioInfo: null, /* set whenever an audio file is playing */
   pendingTorrents: {}, /* infohash to WebTorrent handle */
   devices: { /* playback devices like Chromecast and AppleTV */
     airplay: null, /* airplay client. finds and manages AppleTVs */