Remove all use of document indices

frontend/src/components/widgets/buttons/IconButton.vue

@@ -1,5 +1,5 @@
 <template>
-	<button class="icon-button" :class="`size-${String(size)}`" @click="action">
+	<button class="icon-button" :class="`size-${String(size)}`" @click="(e) => action(e)">
 		<IconLabel :icon="icon" />
 	</button>
 </template>

frontend/src/components/workspace/Panel.vue

@@ -11,7 +11,7 @@
 					@click.middle="(e) => e.stopPropagation() || (closeAction && closeAction(tabIndex))"
 				>
 					<span>{{ tabLabel }}</span>
-					<IconButton :action="(e) => closeAction && closeAction(e, tabIndex)" :icon="'CloseX'" :size="16" v-if="tabCloseButtons" />
+					<IconButton :action="(e) => e.stopPropagation() || (closeAction && closeAction(tabIndex))" :icon="'CloseX'" :size="16" v-if="tabCloseButtons" />
 				</div>
 			</div>
 			<PopoverButton :icon="PopoverButtonIcon.VerticalEllipsis">

frontend/src/dispatcher/js-messages.ts

@@ -41,9 +41,7 @@ export class UpdateInputHints extends JsMessage {
 	readonly hint_data!: HintData;
 }
 
-export class HintGroup extends Array<HintInfo> {}
-
-export class HintData extends Array<HintGroup> {}
+export type HintData = HintInfo[][];
 
 export class HintInfo {
 	readonly keys!: string[];