Can't add icons to icon pack by pasting the clipboard after the first one

[Nek-12]

When using an icon pack mode and pasting the icon into the window, the UI changes to display a list of a single icon and the "Export" button, and it is no longer possible to add new icons to it by hitting CTRL+V again with a different clipboard content.

Desired flow:

1. Designer provides 4 icons on figma to export
2. I quickly copy the icon, then paste it into the plugin.
3. I copy the 2nd icon and paste it, it is added to the displayed list
4. I accidentally hit Ctrl+V again pasting a duplicate icon
5. Nothing changes, the duplicate icon is ignored
6. I copy the 3rd and 4th icon and paste them.
7. I try to export icons, but due to them having no names the plugin shows an error message
8. I rename each of the 4 icons and click export
9. 4 files are created.