Improved episode and film UI

* Show track selection as disabled if there is only 1 option
* Series: show episode numbers

qml/components/itemdetails/EpisodeDetails.qml

@@ -42,7 +42,15 @@ Column {
 
     PlainLabel {
         id: tinyDetails
-        text: qsTr("Released: %1 — Run time: %2").arg(itemData.ProductionYear).arg(Utils.ticksToText(itemData.RunTimeTicks))
+        text: {
+            if (typeof itemData.IndexNumberEnd !== "undefined") {
+                qsTr("Episode %1–%2 Season %3").arg(itemData.IndexNumber)
+                                               .arg(itemData.IndexNumberEnd)
+                                               .arg(itemData.ParentIndexNumber)
+            } else {
+                qsTr("Episode %1 Season %2").arg(itemData.IndexNumber).arg(itemData.ParentIndexNumber)
+            }
+        }
     }
 
     PlainLabel {

qml/components/itemdetails/VideoTrackSelector.qml

@@ -35,6 +35,7 @@ Column {
     ComboBox {
         id: audioSelector
         label: qsTr("Audio track")
+        enabled: audioModel.count > 1
         menu: ContextMenu {
             Repeater {
                 model: audioModel
@@ -49,6 +50,7 @@ Column {
     ComboBox {
         id: subitleSelector
         label: qsTr("Subtitle track")
+        enabled: subtitleModel.count > 0
         menu: ContextMenu {
             MenuItem {
                 readonly property int _index: -1