Custom environment settings dialog cannot handle spaces in path to conda executable

[PaulKGrimes]

I just spent 30 minutes or so failing to get JLD to work with my existing mambaforge Jupyter Lab environment on Windows 11. The underlying issue is that the custom environment settings dialog cannot find conda.exe if there are spaces in the path to the executable - e.g. C:/Users/First Last/mambaforge/Scripts/conda.exe

There is also no dialog for adjusting the settings of an already configured environment from the list of environments, which would make accessing this setting easier.