try to fix wsl open3d crash

examples/gui/layout.py

@@ -32,7 +32,7 @@ Performance (3D dashboard; edit DashboardLayout defaults):
   timer_interval_ms   — Qt timer period (16 ≈ 60 Hz tick rate)
   mesh_render_stride  — render 3D mesh every N frames (2 ≈ half mesh cost)
   chart_update_stride — update force charts every N frames
-  mesh_async_render   — background mesh render (Linux only; Windows uses sync)
+  mesh_async_render   — reserved for future use; mesh rendering currently stays on the UI thread
 
 Edit TOP_ROW.slots to reorder or resize panels; set ``enabled=False`` to hide a panel (e.g. arrows).
 Log sits under charts only (not under mesh). Settings is the rightmost column.
@@ -256,7 +256,7 @@ class DashboardLayout:
     mesh_render_height_px: int = MESH_RENDER_HEIGHT_PX
 
     timer_interval_ms: int = 16
-    mesh_async_render: bool = True
+    mesh_async_render: bool = False
     mesh_render_stride: int = 2
     chart_update_stride: int = 2