Custom area: Deleting a previously uploaded geometry opens the "upload" dialog instead of deleting the uploaded geometry

[lhilarides]

Deleting a previously uploaded geometry opens the "upload" dialog instead of deleting the uploaded geometry, see below (when you click "delete area", the windows explorer / mac finder opens):

[klongleywood]

@mluena I wasn't able to replicate this because the application crashes when I try to upload a shapefile -- which made me think, do we need to provide some guidance that the shapefile needs to be zipped for people to upload it? Are there other specs (size, coordinate system, etc...) to make this feature less likely to work? FYI @lhilarides