Refine decoy UI text and lock dark theme

frontend/src/views/ContentStream.vue

@@ -5,7 +5,6 @@
 				<span class="legend-pill request-pill">Request</span>
 				<span class="legend-pill response-pill">Response</span>
 			</div>
-			<ThemeButton class="d-inline-flex theme-toggle"/>
 		</div>
 		<Packet v-for="packetWithOffset in packetsWithOffsets"
 				:key="packetWithOffset.packet.id"
@@ -19,7 +18,6 @@
 
 <script>
 	import Packet from '../components/Packet';
-	import ThemeButton from '@/components/ThemeButton.vue';
 
 	export default {
 		name: 'ContentStream',
@@ -97,7 +95,6 @@
 			},
 		},
 		components: {
-			ThemeButton,
 			Packet,
 		},
 	};