Fix background threading issues

Removes duplicate GlobalData structs
Fixes authHeader being passed between thread handlers
Moves async handlers in PlayerView to be user initiated
Fixes duplicate navigationviews to limit mem usage.

JellyfinPlayer/ConnectToServerView.swift

@@ -153,14 +153,14 @@ struct ConnectToServerView: View {
                                     newUser.username = _username.wrappedValue
                                     newUser.user_id = json["User"]["Id"].string ?? ""
                                     
-                                    globalData.authHeader = authHeader
-                                    
                                     let keychain = KeychainSwift()
                                     keychain.set(json["AccessToken"].string ?? "", forKey: "AccessToken_\(json["User"]["Id"].string ?? "")")
                                     
                                     do {
                                         try viewContext.save()
                                         DispatchQueue.main.async { [self] in
+                                            globalData.authHeader = authHeader
+                                            _rootIsActive.wrappedValue = false
                                             jsi.did = true
                                         }
                                     } catch {

JellyfinPlayer/ContentView.swift

@@ -334,11 +334,11 @@ struct ContentView: View {
         if(needsToSelectServer) {
             NavigationView() {
                 ConnectToServerView(isActive: $needsToSelectServer)
-            }
+            }.environmentObject(globalData)
         } else if(isSignInErrored) {
             NavigationView() {
                 ConnectToServerView(skip_server: true, skip_server_prefill: globalData.server, reauth_deviceId: globalData.user?.device_uuid ?? "", isActive: $isSignInErrored)
-            }
+            }.environmentObject(globalData)
         } else {
             if(!jsi.did) {
                 LoadingView(isShowing: $isLoading) {