fix: sortable k-items when not defined

Author: distantnative

panel/src/components/Collection/Items.vue

@@ -36,13 +36,13 @@
 				<k-item
 					:key="item.id"
 					v-bind="item"
-					:class="{ 'k-draggable-item': sortable && item.sortable }"
+					:class="{ 'k-draggable-item': sortable && item.sortable !== false }"
 					:image="imageOptions(item)"
 					:layout="layout"
 					:link="link ? item.link : false"
 					:selecting="selecting"
 					:selectable="item.selectable"
-					:sortable="sortable && item.sortable"
+					:sortable="sortable && item.sortable !== false"
 					:theme="item.theme ?? theme"
 					:width="item.column"
 					@click="$emit('item', item, itemIndex)"