Hi Robert Lukkenaer,
You can select multiple items using SHIFT + Up/Down. Currently selecting items with the Space key and CTRL + Up/Down is not possible but we could possibly implement this behavior using a custom KeybordProvider as demonstrates here.
I am really interested to hear more about selecting items using CTRL + Cursor Up/Down. How should CTRL + Up/Down selection work? In most scenarios CTRL + Up/Down moves the current item and no selection is performed.
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