How do I load a preset for a bitmap effect?

I have several presets saved for the channel mixer and tone curve that I use quite often. Used to be, the dialog box would have a place to load a preset, but now that Draw uses Paint's docker format (which I don't like mind you, give me back the separate dialog boxes for each effect) I don't see any way to load an existing preset? The preset files are saved in the documents folder, under Bitmap Presets, but I don't see any obvious way to load them? This goes for Photo-Paint as well, not sure if I'm just missing something obvious or if the function has been eliminated?

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