Channels layout improvements, other UI fixes

Shared/Player/PlaybackBar.swift

@@ -59,7 +59,7 @@ struct PlaybackBar: View {
             Image(systemName: "chevron.down.circle.fill")
         }
         .accessibilityLabel(Text("Close"))
-        .buttonStyle(BorderlessButtonStyle())
+        .buttonStyle(.borderless)
         .foregroundColor(.gray)
         .keyboardShortcut(.cancelAction)
     }

Shared/Player/VideoDetails.swift

@@ -26,8 +26,8 @@ struct VideoDetails: View {
                         Text(video.channel.name)
                             .font(.system(size: 13))
                             .bold()
-                        if !video.channel.subscriptionsCount.isEmpty {
-                            Text("\(video.channel.subscriptionsCount) subscribers")
+                        if let subscribers = video.channel.subscriptionsString {
+                            Text("\(subscribers) subscribers")
                                 .font(.caption2)
                         }
                     }
@@ -154,7 +154,7 @@ struct VideoDetails: View {
         .frame(minWidth: 0, maxWidth: .infinity, alignment: .leading)
         .padding([.horizontal, .bottom])
         .onAppear {
-            subscribed = subscriptions.subscribed(video.channel.id)
+            subscribed = subscriptions.isSubscribing(video.channel.id)
         }
     }
 

Shared/Player/VideoPlayerView.swift

@@ -89,10 +89,9 @@ struct VideoPlayerView: View {
             navigationState.showingVideoDetails = navigationState.returnToDetails
         }
         #if os(macOS)
-            .navigationTitle(video.title)
             .frame(maxWidth: 1000, minHeight: 700)
         #elseif os(iOS)
-            .navigationBarTitle(video.title, displayMode: .inline)
+            .navigationBarHidden(true)
         #endif
     }