CSR Attachment extension

[tsteur271]

Apparently the attachment upload behaviour has changed. There is now a fixed list of accepted file extensions in LastPass.

Since there is a fixed list of extensions, my request is to also accept the *.csr file extension. We like to keep our Certificate Signing Request files in LastPass. We are now required to upload them as server.csr.txt where we used to just be able to upload them as server.csr.

Please also allow the *.csr file extension.