feat(kanban): allow folding done column by clicking green checkmarks in Kanban view (#1393)

frontend/src/components/project/views/ProjectKanban.vue

@@ -47,6 +47,7 @@
 										v-if="bucket.id !== 0 && view?.doneBucketId === bucket.id"
 										v-tooltip="$t('project.kanban.doneBucketHint')"
 										class="icon is-small has-text-success mie-2"
+										@click.stop="() => collapseBucket(bucket)"
 									>
 										<Icon icon="check-double" />
 									</span>
@@ -929,6 +930,10 @@ $filter-container-height: '1rem - #{$switch-view-height}';
 		padding: .5rem;
 		block-size: $bucket-header-height;
 
+		.icon.has-text-success {
+			cursor: pointer;
+		}
+
 		.limit {
 			padding: 0 .5rem;
 			font-weight: bold;