cabana: disable tool window collapse (#38906)

Author: greatgitsby

openpilot/tools/cabana/ui/tools/tooldialog.h

@@ -28,7 +28,7 @@ class ToolDialog {
     ImGui::SetNextWindowSize(size, ImGuiCond_Appearing);
     setNextWindowFloatsOut();
     began_ = true;
-    return visible_ = ImGui::Begin(title_.c_str(), &open_, ImGuiWindowFlags_NoSavedSettings);
+    return visible_ = ImGui::Begin(title_.c_str(), &open_, ImGuiWindowFlags_NoSavedSettings | ImGuiWindowFlags_NoCollapse);
   }
 
   bool end() {