[noticket] Add fix for devenv usage outside of project folder

[lx-wnk]

1. Why is this change necessary?

If devenv is placed in the parent folder of the project - whyever - this will result in an exit instead of keeping the project running

2. What does this change do, exactly?

Switch an exit with a sleep

3. Describe each step to reproduce the issue or behaviour.

Setup a new project, run and setup it initially and restart devenv

4. Please link to the relevant issues (if any).

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5. Checklist

• I have rebased my changes to remove merge conflicts
• I have written or adjusted the documentation according to my changes