Open File Dialog shows file endings multiple times

[marstamm]

Describe the bug

All file types that exist both for C8 and C7 are shown twice

Steps to reproduce

1. Click "Open File"
2. Try to filter by file type
3. file types are duplicated

Expected behavior

Each file type is only shown once

Environment

Camunda Modeler system information

• Version: 5.27.0-dev
• Operating System: Linux x86_64 amd64
• Plugins: test, test-client, test-editor-events, test-lint-rules, test-script-error
• Execution Platform: BPMN - Camunda 8

Additional context

No response