Activate script missing after "cate-cli" package installation

[forman]

Expected behavior

We expect the Conda bin/activate (Unix) Scripts/activate.bat (Windows) to exist when running Cate Desktop with a Cate environment

It seems, the activate scripts are installed if also conda is installed. So the preferred way to fix this issue is adding a conda dependency to cate and cate-cli.

Actual behavior

If cate or cate-cli is installed into a new environment using conda (not the installer), the activate scripts as well as conda are missing.

Steps to reproduce the problem

> conda create -n cate-test python=3
> activate cate-test
> conda install -c ccitools -c conda-forge cate-cli=2.0.0.dev4
> cate-cli

--> will exit with error code, because ./Scripts/activate.bat cannot be found.

Specifications

Cate 1.0 to 2.0.0.dev4

[forman]

I put the conda dependency back again