rename app to subtracks

app/app.json

@@ -1,4 +1,4 @@
 {
-  "name": "SubSonify",
-  "displayName": "SubSonify"
+  "name": "subtracks",
+  "displayName": "Subtracks"
 }

app/subsonic/api.ts

@@ -69,7 +69,7 @@ export class SubsonicApiClient {
     this.params.append('t', server.token)
     this.params.append('s', server.salt)
     this.params.append('v', '1.15.0')
-    this.params.append('c', 'subsonify-cool-unique-app-string')
+    this.params.append('c', 'subtracks')
   }
 
   private buildUrl(method: string, params?: { [key: string]: any }): string {