Unable to download documents/attachments

I tried to send diagnostics, got another silent error:

```
ERROR 2023-06-09T15:01:49.056 tokio-runtime-worker(ThreadId(6)) [1P:op-app/src/app/backend.rs:264] AppError at op-app/src/app/backend/settings.rs:92:17
LinuxError(DBus(MethodError(OwnedErrorName(ErrorName(Str(Owned("org.freedesktop.DBus.Error.ServiceUnknown")))), Some("The name org.freedesktop.FileManager1 was not provided by any .service files"), Msg { type: Error, sender: UniqueName(Str(Borrowed("org.freedesktop.DBus"))), reply-serial: 2, body: Signature("s") })))

Stack backtrace:
0: op_app::app::backend::settings::settings::{{closure}}
1: op_app::app::backend::async_task::{{closure}}
2: op_executor::spawn_no_span::{{closure}}
3: tokio::loom::std::unsafe_cell::UnsafeCell::with_mut
4: tokio::runtime::task::harness::Harness::poll
5: tokio::runtime::scheduler::multi_thread::worker::Context::run_task
6: tokio::runtime::scheduler::multi_thread::worker::Context::run
7: tokio::macros::scoped_tls::ScopedKey::set
8: tokio::runtime::scheduler::multi_thread::worker::run
9: tokio::loom::std::unsafe_cell::UnsafeCell::with_mut
10: tokio::runtime::task::harness::Harness::poll
11: tokio::runtime::blocking::pool::Inner::run
12: std::sys_common::backtrace::__rust_begin_short_backtrace
13: core::ops::function::FnOnce::call_once{{vtable.shim}}
14: alloc::boxed::Box%3CF,A as core::ops::function::FnOnce>::call_once
at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
alloc::boxed::Box%3CF,A as core::ops::function::FnOnce>::call_once
at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/alloc/src/boxed.rs:1987:9
std::sys::unix::thread::Thread::new::thread_start
at /rustc/84c898d65adf2f39a5a98507f1fe0ce10a2b8dbc/library/std/src/sys/unix/thread.rs:108:17
15:
16:

Error occurred in handler for 'invoke': [Error: LinuxError(DBus(MethodError(OwnedErrorName(ErrorName(Str(Owned("org.freedesktop.DBus.Error.ServiceUnknown")))), Some("The name org.freedesktop.FileManager1 was not provided by any .service files"), Msg { type: Error, sender: UniqueName(Str(Borrowed("org.freedesktop.DBus"))), reply-serial: 2, body: Signature("s") })))]
```