Revert "software/theia: version up ms-python 2020.4.74986"

This reverts commit 7e3bc5ee.

Theia does not seem to be ready for this version, several things are not
working:
 - selecting another python interpreter
 - linting in the editor
 - at startup there's always a "Python is not installed.Please download
and install Python before using the extension." warning . I think this
happened sometimes with the previous version too.

jedi was working fine, but too maybe critical features are broken.

software/theia/software.cfg

@@ -287,7 +287,7 @@ template =
           "vscode-java-dependency-viewer": "https://github.com/microsoft/vscode-java-dependency/releases/download/0.6.0/vscode-java-dependency-0.6.0.vsix",
           "vscode-java-redhat": "https://github.com/redhat-developer/vscode-java/releases/download/v0.54.2/redhat.java-0.54.2.vsix",
           "vscode-java-test": "https://github.com/microsoft/vscode-java-test/releases/download/0.22.0/vscjava.vscode-java-test-0.22.0.vsix",
-          "vscode-python": "https://github.com/microsoft/vscode-python/releases/download/2020.4.74986/ms-python-release.vsix",
+          "vscode-python": "https://github.com/microsoft/vscode-python/releases/download/2020.1.58038/ms-python-release.vsix",
           "vscode-ruby": "https://github.com/rubyide/vscode-ruby/releases/download/v0.25.0/ruby-0.25.0.vsix",
           "vscode-zc-buildout": "https://github.com/perrinjerome/vscode-zc-buildout/releases/download/v0.2.0/vscode-zc-buildout-0.2.0.vsix"
       }