Multi-element context pad is missing in DMN editor

[barmac]

Describe the bug

In DMN editor, there is no context pad when multiple elements are selected. The only way to remove multiple elements at once in that case is via a shortcut.

Steps to reproduce

1. Select multiple elements.
2. now this happens

Expected behavior

There should be a context pad as in BPMN:

Environment

• OS: [e.g. MacOS 10.2, Windows 10]
• Camunda Modeler Version: any
• Execution Platform: [e.g. Camunda 7, Camunda 8]
• Installed plug-ins: [...]

Additional context

This issue is not caused by the new context pad. The multi-element context pad was missing before, too.