Allow android user to upload files to mirrored columns

[NeilWu]

Android user cannot directly upload files to a mirrored column. We currently have to go back to the original board and find out the column to do so. This process is painful because original board contains too much information for mobile phone user. Looking for the correct column within a small screen is hard. That’s why we Mirror the column to a new board with few critical columns only for the ease of mobile phone user. For example, our driver can upload photos of delivered goods to the mirrored column in the new board. Iphone user has no problem, it works like a charm. But android user still cannot upload anything.