Move renamed Keys page into Operations

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

@@ -88,10 +88,10 @@
 
 <svelte:head><title>Keys · Electric Cherry</title></svelte:head>
 <div class="page">
-<SectionHeader title="Server keys" subtitle="Save a Plutonium key for each server ID. Keys are kept when a server is destroyed.">
+<SectionHeader title="Keys" subtitle="Save a Plutonium key for each server ID. Keys are kept when a server is destroyed.">
     {#snippet actions()}<Button variant="primary" onclick={addKey}>Add key</Button>{/snippet}
 </SectionHeader>
-<div class="ui-toolbar"><input type="search" aria-label="Search server keys" bind:value={search} oninput={event => { search = event.currentTarget.value; limit = 25; saveSearch(); }} placeholder="Search servers…" /></div>
+<div class="ui-toolbar"><input type="search" aria-label="Search keys" bind:value={search} oninput={event => { search = event.currentTarget.value; limit = 25; saveSearch(); }} placeholder="Search servers…" /></div>
 
 {#if error && !open}<div role="alert" class="ui-error">{error}<Button size="sm" onclick={reload}>Retry</Button></div>{/if}
 {#if notice}<p role="status">{notice}</p>{/if}