dear-imgui-conan fails after build

I cannot launch dear-imgui-conan after the build. If I create a symlink to ~/.conan as /home/conan it fixes the first error, but it is kinda workaround.
```
libGL error: MESA-LOADER: failed to open swrast (search paths /home/conan/.conan/data/mesa/19.3.1/bincrafters/stable/package/0584dc45620b4bdf99bddb906b9a0e5224605ec2/lib/dri)
libGL error: failed to load driver: swrast
Glfw Error 65543: GLX: Failed to create context: BadMatch
```

Start from the dear-imgui-conan example's build and launch path and reproduce the failure in the issue body. Investigate why the runtime searches under /home/conan/.conan instead of the user's ~/.conan, then verify that the example launches without the symlink workaround and without the reported Mesa or GLX errors.

Written by the indexing model from the issue text.