Feature Request: Un-select in the Interactive Classifier

In the Interactive Classifier, it is possible to grab multiple glyphs to group them together by clicking and dragging a bounding box around the items you wish to group, which will all then show up in the left panel for naming and grouping. However, in instances where there are many elements close together, or the page is particularly noisy (etc.), it is possible to accidentally grab glyphs you don't want to include. Currently the IC doesn't let you deselect one among many selected glyphs without having to click individually through small items. It would be nice if it was possible to deselect an accidentally included glyph in the left panel somehow.