Integrate new gbs-downloader for SDMF download issue fix

Closes #72

See merge request !64

Give the modal dialogs a bit less bottom padding

Closes #75

See merge request !63

Give modal dialogs slightly less bottom padding.

I believe this was already fixed in a later version of Material Design
Components for the Web - which we don't use because it introduced more
bugs.

Fixes #75.

Add the production server configuration and use it

See merge request !59

Then we have to `fixInstall` to handle the consequences

Style the wormhole code input

See merge request !62

Magic wormhole invites

See merge request !57

Remove action buttons on the FileBrowser top app bar

See merge request !61

Add instructions where to get PrivateStorage Desktop to start screen

See merge request !60

Co-authored-by: Florian <florian@private.storage>