Rename Server keys page to Keys

src/routes/+layout.svelte

@@ -66,7 +66,7 @@
         { href: '/plugins',     label: 'Plugins',     match: (p: string) => p.startsWith('/plugins') },
         { href: '/deployments', label: 'Deployments', match: (p: string) => p === '/deployments' },
         { href: '/campaigns', label: 'Campaigns', match: (p: string) => p.startsWith('/campaigns') },
-        { href: '/server-keys', label: 'Server keys', match: (p: string) => p.startsWith('/server-keys') },
+        { href: '/server-keys', label: 'Keys', match: (p: string) => p.startsWith('/server-keys') },
         { href: '/betas',       label: 'Betas',       match: (p: string) => p.startsWith('/betas') }
     ];
 </script>

src/routes/server-keys/+page.svelte

@@ -51,8 +51,8 @@
     }
 </script>
 
-<svelte:head><title>Server keys · Electric Cherry</title></svelte:head>
-<h1>Server keys</h1>
+<svelte:head><title>Keys · Electric Cherry</title></svelte:head>
+<h1>Keys</h1>
 <p>Save a Plutonium key for each server ID, even when the server is not deployed. Destroying a server keeps its saved key.</p>
 <form onsubmit={save}>
     <h2>{editing ? 'Update key' : 'Add key'}</h2>