fix(get): prevent invalid gui_element "Pulldown" (DEV-1781)

[jnussbaum]

resolves DEV-1781

[linear]

DEV-1781 DSP-TOOLS: workaround to prevent gui_element Pulldown

If you execute dsp-tools get -s https://api.demo.dasch.swiss -u rootexample.com -p demo6783 -P 0790 mark16.json, you get a list-property with the invalid gui_element Pulldown:

{
    "name": "test-subjects",
    "super": [
        "hasValue"
    ],
    "object": "ListValue",
    "labels": {
        "en": "subjects"
    },
    "gui_element": "Pulldown",
    "gui_attributes": {
        "hlist": "R6e67svWRQKdjDnAOM0vBg"
    }
}

As can be seen in the list name, this must originate from a list created via DSP-APP.

We already had similar issues:

• https://linear.app/dasch/issue/DEV-1089
• https://linear.app/dasch/issue/DEV-847
• https://linear.app/dasch/issue/DEV-625

This should be fixed in DSP-APP / DSP-API, but I will add a temporary workaround in DSP-TOOLS.

[jnussbaum]

See description in ticket for more background info

[BalduinLandolt]

LGTM