The warning is accompagnied by a quick fix that adds the file to the enclosing project's environment (which can be stored in preferences or in a .dsl file).
Demo
_Editing a file that is not in the .dsl/preferences_:
![demo-issue-153](https://user-images.githubusercontent.com/25926433/86514843-1ee2eb80-be15-11ea-9b98-3919e2d0d228.gif)
@dvojtise the code updating the environment (in AleQuickfixProvider) is currently duplicated from other parts of the code; I plan to address this later with #174.
Closes #153
The warning is accompagnied by a quick fix that adds the file to the enclosing project's environment (which can be stored in preferences or in a .dsl file).
Demo