fix: move category dropdown to its own line in flag filters

templates/partials/flags/filters.tpl

@@ -27,8 +27,10 @@
 			<fieldset>
 				<div class="form-group">
 					<label for="filter-cid">[[flags:filter-cid]]</label>
+					<div class="input-group">
 					<!-- IMPORT partials/category-filter.tpl -->
 					</div>
+				</div>
 				<div class="form-group">
 					<label for="sort">[[flags:sort]]</label>
 					<select class="form-control" id="sort" name="sort">