Added Playback Rate functionality (#933)

* Add () to openAudioControls function call

* Duplicate new placeholder modal

* Add to app.modals

* Make modal do something

* Changed input to slider

* Change i18n string name and remove con.log

* Finalized i18n strings

* Add to store.ts and update i18n hehe

* Save rate to cfg

* fuck off

* AAHH

* Make auto-set more reliable

* no nightcore stuff here

Co-authored-by: cryptofyre <cryptofyre@cryptofyre.org>

src/renderer/main/vueapp.js

@@ -203,6 +203,7 @@ const app = new Vue({
             audioSettings: false,
             pluginMenu: false,
             audioControls: false,
+            audioPlaybackRate: false,
             showPlaylist: false,
             castMenu: false,
             moreInfo: false,