When viewing the schema, highlight Structural and non-Structural classes

resources/views/fragment/schema/objectclasses.blade.php

@@ -2,9 +2,12 @@
 	<div class="col-12 col-xl-3">
 		<select id="objectclass" class="form-control">
 			<option value="-all-">-all-</option>
-			@foreach ($objectclasses as $o)
+			@foreach($objectclasses->groupBy(fn($item)=>$item->isStructural()) as $oo)
+				<optgroup label="{{ __($oo->first()->isStructural() ? 'Structural' : 'Auxillary') }} Object Class"></optgroup>
+				@foreach($oo as $o)
 					<option value="{{ $o->name_lc }}">{{ $o->name }}</option>
 				@endforeach
+			@endforeach
 		</select>
 	</div>