feat: track can be put out of no media avialable mode

app/components/track-edit/component.js

@@ -37,6 +37,5 @@ export default TrackFormComponent.extend({
 	setMediaAvailable: task(function * (event) {
 		event.preventDefault()
 		set(this, 'track.mediaNotAvailable', false)
-		get(this, 'submitTask').perform(event)
 	}).drop()
 })

app/components/track-edit/template.hbs

@@ -49,9 +49,9 @@
 			<button
 					onclick={{perform submitTask}}
 					type="submit"
-					class="Btn Btn--primary"
+					class="Btn"
 					title="Save the track"
-					disabled={{submitTask.isRunning}}>
+				  disabled={{submitDisabled}}>
 				{{if submitTask.isIdle "Save" "Saving…"}}
 			</button>
 

app/components/track-form/component.js

@@ -3,7 +3,7 @@ import youtubeUrlToId from 'radio4000/utils/youtube-url-to-id';
 import {fetchTitle} from 'radio4000/utils/youtube-api';
 import {task, timeout} from 'ember-concurrency';
 
-const {Component, get, set, observer} = Ember;
+const {Component, get, set, observer, computed} = Ember;
 
 export default Component.extend({
 	tagName: 'form',
@@ -43,6 +43,10 @@ export default Component.extend({
 		}
 	}),
 
+	submitDisabled: computed('track.hasDirtyAttributes', 'submitTask', function() {
+		return !this.get('track.hasDirtyAttributes') || this.get('submitTask.isRunning')
+	}),
+
 	fetchTitle: task(function * () {
 		yield timeout(250); // throttle
 		const track = get(this, 'track')