feat(gui): Migrate Project Settings window to imgui_window scope

src/gui_2.py

@@ -918,7 +918,7 @@ class App:
    
    #region: Project Settings
    if self.show_windows.get("Project Settings", False):
-    exp, opened = imgui.begin("Project Settings", self.show_windows["Project Settings"])
+    with imgui_window("Project Settings", self.show_windows["Project Settings"]) as (exp, opened):
      self.show_windows["Project Settings"] = bool(opened)
      if exp:
       if imgui.begin_tab_bar('context_hub_tabs'):
@@ -929,7 +929,6 @@ class App:
         self._render_paths_panel()
         imgui.end_tab_item()
        imgui.end_tab_bar()
-    imgui.end()
    #endregion: Project Settings
    
    #region: Files & Media window