fix: remove remaining uses of var-declared variables

src/components/filemanager/Files.vue

@@ -309,7 +309,7 @@ export default {
     // temporary data (which will be used to check if anything changed) and
     // then open the editing modal
     editFile: function (id) {
-      var file = this.getFileById(id)
+      const file = this.getFileById(id)
       this.filemeta.id = file.id
       this.filemeta.artist = file.metadata.artist
       this.filemeta.album = file.metadata.album

src/components/filemanager/Playlists.vue

@@ -137,7 +137,7 @@ export default {
   methods: {
     playlistToolTip(entries) {
       let text = '<div style="white-space: nowrap;" align="left">'
-      for (var i in entries) {
+      for (const i of entries) {
         text += i + ': ' + entries[i].uri + '<br>'
       }
       text += '</div>'

src/mixins/timeslotSort.js

 function compareEpisodesByDate(a, b) {
-  var dateA = new Date(a.start)
-  var dateB = new Date(b.start)
+  const dateA = new Date(a.start)
+  const dateB = new Date(b.start)
   if (dateA < dateB) {
     return -1
   } else if (dateA > dateB) {
@@ -13,9 +13,9 @@ function compareEpisodesByDate(a, b) {
 export default {
   computed: {
     timeslotsPast: function () {
-      var eps = []
-      var now = new Date()
-      for (var x in this.timeslotsSortedDate) {
+      const eps = []
+      const now = new Date()
+      for (const x of this.timeslotsSortedDate) {
         if (new Date(this.timeslots[x].start) < now) {
           eps.push(this.timeslots[x])
         }
@@ -23,9 +23,9 @@ export default {
       return eps
     },
     timeslotsFuture: function () {
-      var eps = []
-      var now = new Date()
-      for (var x in this.timeslotsSortedDate) {
+      const eps = []
+      const now = new Date()
+      for (const x of this.timeslotsSortedDate) {
         if (new Date(this.timeslots[x].start) >= now) {
           eps.push(this.timeslots[x])
         }