Allow adding more tools/ingredients when pressing enter

[provokateurin]

Is your feature request related to a problem? Please describe.
When adding tools or ingredients I press enter out of a habit expecting that another field will be added.
Since the input fields are single line the enter key has no use and this would make it very convenient as it also means I don't have to use my mouse to add another field.

Describe the solution you'd like
When pressing enter in a tools/ingredients field another field should be added after the current one.

[christianlupus]

Duplicate of #2258