With unified dialog for CMake presets, reconfigure happens when switching between build presets of the same configure preset

In a simple setup where you have 1 configure preset and 2 build presets for it, switching between the presets causes a configure of the project when the unified menu is used and it does not do it.

This might not be relevant in a toy example that configures very fast, though it does matter when the step takes minutes.

Setup:

• Create a file code.cpp, content irrelevant, it just needs to exist
• Create a file CMakeLists.txt with content:

cmake_minimum_required(VERSION 3.27)
project(proj CXX)
add_library(lib code.cpp)

• Create a file CMakePresets.json with content:

{
  "version": 6,
  "configurePresets": [
    {
      "name": "p",
      "binaryDir": "${sourceDir}/.out"
    }
  ],
  "buildPresets": [
    {
      "name": "p1",
      "configurePreset": "p"
    },
    {
      "name": "p2",
      "configurePreset": "p"
    }
  ]
}

To reproduce:

• Open Visual Studio with all default settings, this should have the unified menu active and use the presets when available.
• Wait until startup completed
• Go in output window to 'CMake' in the drop down
• Notice that the CMake output of CMake configure is there
• Press the clear content
• On top, switch from preset 'p1' to 'p2'
• Notice that the CMake output of CMake configure is there

When disabling the unified menu, the last step does not happen.

Bug found on visual studio with this version:

Microsoft Visual Studio Professional 2022
Version 17.14.9 (July 2025)
VisualStudio.17.Release/17.14.9+36310.24.-july.2025-