Add trash can to Additional Items

[jidanni]

Here each brown line includes a trash can,

Except this brown line:

In fact it could include the copy, cut icons too just like the pumping station brown line above.

[simonpoole]

There is no way for the app to know if the tags listed in "Additional properties" belong together or not, as they are not part of a preset (the reason why they are listed there in the 1st place). As a result a "global" delete doesn't make sense for these tags.

[jidanni]

It's just a convenience item, if one wanted to delete all of them.