Increase obviousness of how to remove a term in a term-input

[nilmerg]

At the moment a term can be removed by clicking on it. This must not change. However, the indication of this functionality needs to be improved. Hovering over a term shows a trash icon on the left hand. The color doesn't change.

The trash icon must be shown in the middle over the term and have a reddish color. The term's label must have a grayish color then.