All of PieFed is still in development :)
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In general, the popups don't work great on mobile. We have them on lots of other UI elements (like navbar buttons in the upper right on desktop) and they are a native Bootstrap thing (the css framework we use). However, they aren't really touch friendly, and seem to get stuck a lot (even on desktop). If any web dev folks out there know a better solution for this functionality, we are open for suggestions.
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