Fix playback rate reset when video ends (#7718)

* Prevent plaback rate reset when video ends

* remove redundant if statement

* remove redundant code

* remove session storage

Author: caetano-dev

src/renderer/components/ft-shaka-video-player/ft-shaka-video-player.js

@@ -2514,6 +2514,14 @@ export default defineComponent({
     // #region setup
 
     onMounted(async () => {
+      watch(() => props.currentPlaybackRate,
+        (newRate) => {
+          if (video.value) {
+            video.value.playbackRate = newRate
+            video.value.defaultPlaybackRate = newRate
+          }
+        }
+      )
       const videoElement = video.value
 
       const volume = sessionStorage.getItem('volume')