Add file viewer branding options

svelte/src/util/ThemePicker.svelte

@@ -0,0 +1,53 @@
+<script>
+import { createEventDispatcher } from "svelte";
+let dispatch = createEventDispatcher()
+
+export let theme = ""
+let set = s => {
+	theme = s
+	dispatch("theme_change", theme)
+}
+
+</script>
+
+<div class="center">
+	<button class:button_highlight={theme===""} on:click={() => {set("")}}>
+		None
+	</button>
+	<button class:button_highlight={theme==="default"} on:click={() => {set("default")}}>
+		Default (purple)
+	</button>
+	<button class:button_highlight={theme==="classic"} on:click={() => {set("classic")}}>
+		Classic
+	</button>
+	<button class:button_highlight={theme==="solarized_dark"} on:click={() => {set("solarized_dark")}}>
+		Solarized
+	</button>
+	<button class:button_highlight={theme==="maroon"} on:click={() => {set("maroon")}}>
+		Maroon
+	</button>
+	<button class:button_highlight={theme==="hacker"} on:click={() => {set("hacker")}}>
+		Hacker
+	</button>
+	<button class:button_highlight={theme==="canta"} on:click={() => {set("canta")}}>
+		Canta
+	</button>
+	<button class:button_highlight={theme==="nord"} on:click={() => {set("nord")}}>
+		Nord
+	</button>
+	<button class:button_highlight={theme==="snowstorm"} on:click={() => {set("snowstorm")}}>
+		Snowstorm
+	</button>
+	<button class:button_highlight={theme==="deepsea"} on:click={() => {set("deepsea")}}>
+		Deep sea
+	</button>
+	<button class:button_highlight={theme==="skeuos"} on:click={() => {set("skeuos")}}>
+		Skeuos
+	</button>
+</div>
+
+<style>
+.center {
+	text-align: center;
+}
+</style>