Since we already depend on `rustc-hash` transiently, this doesn't add
any more dependencies. As long as DOS attacks aren't a concern (which I
don't think they are?), this should be free performance.
In my (admittedly naive) testing, this really improved CPU usage in some
cases, which is pretty nice to get for free.
Updates all dependencies other than ICU.
Enables the `dbus-config` libcosmic feature to fix theming responsiveness.
Also prevents the trash and network drive layer container from touching the edge of the window.
