Investigate path issue on Windows for save request

[ndoschek]

Currently, the save request that uses the modelUri path as parameter stopped working on Windows. See also the discussion https://github.com/eclipse-emfcloud/emfcloud/discussions/120 on that topic.

Tested via the emfcloud-modelserver-theia example application:

• Send edit request for Coffee.ecore to set ControlUnit name to ControlUnitNew
• Send save request for Coffee.ecore
• Changes are not reflected
• Send saveAll request for Coffee.ecore persists the changes

Investigate if other requests are affected as well.

[eneufeld]

We should check whether this is by chance fixed with the v2 refactorings

[ndoschek]

This problem persists in combination with emfcloud-modelserver-theia using v1. Therefore an issue in the emfcloud-modelserver-theia repository was created: emfcloud-modelserver-theia/issues/90. The basic workflow without the Theia application works (e.g. via direct requests or if using the ExampleModelServerClient) on the Model Server under Windows. Therefore I close this issue in this repo.