feat: allow selecting multiple labels at once (#945)

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/945
Reviewed-by: dpschen <dpschen@noreply.kolaente.de>
Co-authored-by: konrad <k@knt.li>
Co-committed-by: konrad <k@knt.li>

src/components/tasks/partials/editLabels.vue

@@ -12,6 +12,7 @@
 		:create-placeholder="$t('task.label.createPlaceholder')"
 		v-model="labels"
 		:search-delay="10"
+		:close-after-select="false"
 	>
 		<template #tag="props">
 			<span