Steps to reproduce: 1. Create a Toaster project 2. Go to the "import layer" page and import a layer 3. When back in the project configuration page, click on the name of the layer you just imported, which will be listed in the list of project layers 4. In the layer details page, scroll to the 'layer dependencies' text field, type a layer name and add it to the dependencies list 5. In the 'layer dependencies' text field, type the name of the same layer you just added. Outcome: the layer name will come up and you can add it a second time, which will cause an error when you try to remove the duplicate from the list Expected: the layer type ahead should not show suggestions for layers already in the list of dependencies, so that you cannot add the same layer twice.
Cosmetic, would require active checking per keystroke, current no side effect in that the layers are filtered for duplicates, just UI shows multiples.
Keep this for tracking.