Describe the bug

At the moment attempt importing a file into a directory that contains file with a same name will eventually throw an exception when imported file is copied to the destination & crash the program (as reported by @rafaelramalho19)

https://github.com/ipfs-shipyard/ipfs-webui/pull/1655/files

Expected behavior

We should figure out a way to handle name collisions, rather than swallowing an error or logging it into a console.

1. We could check for name collisions prior we even start import.
2. We could deal with name collisions as they occur, similar to how OSs do e.g. suffix with a number.

Screenshots