refactor: move dispose logic out of entrypoint

Dalamud/Dalamud.cs

@@ -31,6 +31,8 @@ namespace Dalamud
 
         private readonly string baseDirectory;
 
+        private bool hasDisposedPlugins = false;
+
         #endregion
 
         /// <summary>
@@ -351,8 +353,13 @@ namespace Dalamud
             this.finishUnloadSignal?.WaitOne();
         }
 
+        /// <summary>
+        /// Dispose subsystems related to plugin handling.
+        /// </summary>
         public void DisposePlugins()
         {
+            this.hasDisposedPlugins = true;
+
             // this must be done before unloading plugins, or it can cause a race condition
             // due to rendering happening on another thread, where a plugin might receive
             // a render call after it has been disposed, which can crash if it attempts to
@@ -378,6 +385,9 @@ namespace Dalamud
         {
             try
             {
+                if (!this.hasDisposedPlugins)
+                    this.DisposePlugins();
+
                 this.Framework?.Dispose();
                 this.ClientState?.Dispose();
 

Dalamud/EntryPoint.cs

@@ -59,11 +59,6 @@ namespace Dalamud
                 // Run session
                 dalamud.Start();
                 dalamud.WaitForUnload();
-                if (dalamud.Framework.DispatchUpdateEvents)
-                {
-                    dalamud.DisposePlugins();
-                    Thread.Sleep(100);
-                }
 
                 dalamud.Dispose();
             }