Add multiple attachments to card at once

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Is your feature request related to a problem? Please describe. I always get frustrated when trying to assign multiple attachments to a deck card. You can't currently add multiple files at once. Also, the "Share from files" dialog always starts in the root directory of the Nextcloud account.

Describe the solution you'd like I would like to be able to add multiple attachments to a deck card at once.

Describe alternatives you've considered The file selection dialog remembers the last opened directory and does not always start in the main directory of Nextcloud.

Additional context