shell: Fix bugs found by TypeScript

The cockpit.spawn function takes only two arguments (unlike
cockpit.script).

Location.reload() doesn't take any arguments, the "force_reload"
argument is a Firefox extension.

There is no "this.onSelect".

pkg/shell/nav.tsx

@@ -195,7 +195,7 @@ export class CockpitNav extends React.Component {
         return (
             <>
                 <SearchInput placeholder={_("Search")} value={this.state.search} onChange={(_, search) => this.setState({ search })} onClear={() => this.setState({ search: "" })} className="search" />
-                <Nav onSelect={this.onSelect} theme="dark">
+                <Nav theme="dark">
                     { groups.map(g =>
                         <section className="pf-v5-c-nav__section" aria-labelledby={"section-title-" + g.name} key={g.name}>
                             <div className="nav-group-heading">

pkg/shell/shell-modals.tsx

@@ -45,7 +45,7 @@ export const AboutCockpitModal = ({ dialogResult }) => {
     useInit(() => {
         const packages = [];
         const cmd = "(set +e; rpm -qa --qf '%{NAME} %{VERSION}\\n'; dpkg-query -f '${Package} ${Version}\n' --show; pacman -Q) 2> /dev/null | grep cockpit | sort";
-        cockpit.spawn(["bash", "-c", cmd], [], { err: "message" })
+        cockpit.spawn(["bash", "-c", cmd], { err: "message" })
                 .then(pkgs =>
                     pkgs.trim().split("\n")
                             .forEach(p => {