semiCombo does not support duplicate values

[k-yle]

URL

https://osm.org/edit?way=26229179

How to reproduce the issue?

Fixing this properly will require PRs in 3 different repositories, so I'm creating an issue to keep this organised.

From openstreetmap/id-tagging-schema#1065 (comment):

BTW, there's also a bug when entering multiple none values to the destination:symbol key. If we add two of more none values separated with ; iD only considers one. And if you grab and move one of those none values, iD eliminates all of them and leaves only one in the value part of the tag.

This bug/limitation also affects *:lanes:*, seamark:*:colour, as well as destination:*, where values like …;none;none;… or red;white;red are acceptable.

Screenshot(s) or anything else?

Which deployed environments do you see the issue in?

No response

What version numbers does this issue effect?

all

Which browsers are you seeing this problem on?

Microsoft Edge

[tordans]

What is the order that those PRs need to be merged/released in?

Is there maybe some guarding that we should/can add to allow to untangle them? Something like checking for 'if "allowDuplicates" in preset' in iD?

[k-yle]

ideditor/schema-builder#178 has to go first (also because there might be code review suggestions to rename the field)

for the other two PRs the order doesn't matter. older versions of iD will simply ignore the new field