Adjust ButtonDropdown for night mode

ts/editor-toolbar/ButtonDropdown.svelte

@@ -3,6 +3,8 @@ Copyright: Ankitects Pty Ltd and contributors
 License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 -->
 <script lang="typescript">
+    import { getContext } from "svelte";
+    import { nightModeKey } from "./contextKeys";
     import type { ToolbarItem } from "./types";
     import ButtonGroup from "./ButtonGroup.svelte";
 
@@ -10,10 +12,21 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
     export let className = "";
 
     function extendClassName(className: string): string {
-        return `dropdown-menu bg-transparent border-0 ${className}`;
+        return `dropdown-menu py-1 mb-0 ${
+            nightMode ? "btn-dropdown-menu--night-mode " : ""
+        }${className}`;
     }
 
     export let buttons: ToolbarItem[];
+
+    const nightMode = getContext(nightModeKey);
 </script>
 
+<style>
+    :global(.btn-dropdown-menu--night-mode) {
+        background-color: var(--window-bg);
+        border-color: var(--medium-border);
+    }
+</style>
+
 <ButtonGroup {id} className={extendClassName(className)} {buttons} />

ts/editor-toolbar/ButtonGroup.svelte

@@ -20,14 +20,14 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
 <style lang="scss">
     ul {
-        display: inline-flex;
+        display: flex;
         justify-items: start;
 
         flex-wrap: var(--toolbar-wrap);
         overflow-y: auto;
 
         padding-inline-start: 0;
-        margin-bottom: 0;
+        margin: 0 0 calc(var(--toolbar-size) / 15);
     }
 
     .border-group {
@@ -40,7 +40,6 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 
     li {
         display: inline-block;
-        margin-bottom: calc(var(--toolbar-size) / 15);
 
         > :global(button),
         > :global(select) {

ts/editor-toolbar/EditorToolbar.svelte

@@ -74,5 +74,5 @@ License: GNU AGPL, version 3 or later; http://www.gnu.org/licenses/agpl.html
 </div>
 
 <nav {style}>
-    <ButtonGroup buttons={_buttons} />
+    <ButtonGroup buttons={_buttons} className="mt-0" />
 </nav>