refs #15579 [master-v5]

* add finc facetList for content blocks
* remove ils offline message from finc facetlist
* should be implemented by parent theme(s), for instance home.phtml

themes/finc/templates/ContentBlock/FacetList.phtml

+<!-- finc: ContentBlock -- FacetList -->
+<?php
+	// Load search actions and settings (if any):
+	$options = $this->searchOptions($searchClassId);
+	$basicSearch = $options->getSearchAction();
+	$advSearch = $options->getAdvancedSearchAction();
+	$noJsSupport = $this->config()->nonJavascriptSupportEnabled();
+?>
+
+<?php if (!empty($facetList)): ?>
+  <div class="search-home-facets">
+    <?php
+      $itemSum = $fieldSum = 0;
+      $maxColumns = 4;
+      foreach ($facetList as $field => $details) {
+				$itemSum  += count($details['list']);
+				$fieldSum += 1;
+      }
+    ?>
+		<?php foreach ($facetList as $field => $details): ?>
+			<?php if ($isHierarchy = in_array($field, $hierarchicalFacets ?? [])):
+				$this->headScript()->appendFile('vendor/jsTree/jstree.min.js');
+				$this->headScript()->appendFile('facets.js');
+				$sort = $hierarchicalFacetSortOptions[$field] ?? '';
+				$script = <<<JS
+$(document).ready(function() {
+  $('#facet_{$this->escapeHtml($field)}_container').removeClass('hide');
+  initFacetTree($('#facet_{$this->escapeHtml($field)}'), false);
+});
+JS;
+				echo $this->inlineScript(\Zend\View\Helper\HeadScript::SCRIPT, $script, 'SET');
+				
+				?>
+        <div id="facet_<?=$this->escapeHtml($field)?>_container" class="home-facet <?=$this->escapeHtmlAttr($field)?> hide">
+          <h2><?=$this->transEsc('home_browse') . ' ' . $this->transEsc($details['label'])?></h2>
+          <div id="facet_<?=$this->escapeHtml($field)?>" class="jstree-facet"
+               data-source="<?=$this->escapeHtml($this->searchClassId)?>"
+               data-facet="<?=$this->escapeHtml($field)?>"
+               data-path="<?=$this->url($basicSearch)?>"
+               data-exclude="0"
+               data-operator="AND"
+               data-exclude-title="<?=$this->transEsc('exclude_facet')?>"
+               data-sort="all">
+          </div>
+        </div>
+        <noscript>
+				<?php if (!$noJsSupport): ?>
+        <h2><?=$this->transEsc('home_browse') . ' ' . $this->transEsc($details['label'])?></h2>
+				<?=$this->transEsc('Please enable JavaScript.')?>
+			<?php endif; ?>
+			<?php endif; ?>
+			<?php if (!$isHierarchy || $noJsSupport): // do we need regular display? ?>
+				<?php $sortedList = $this->sortFacetList($results, $field, $details['list'], $basicSearch); ?>
+        <div class="home-facet <?=$this->escapeHtmlAttr($field) ?>">
+          <h2><?=$this->transEsc('home_browse') . ' ' . $this->transEsc($details['label'])?></h2>
+          <div class="home-facet-container">
+            <ul class="home-facet-list">
+							<?php
+
+								// Convenience variable:
+								$currentListLength = count($sortedList);
+
+								// Special case: two columns for LC call numbers...
+								$maxListLength = $field == 'callnumber-first'
+                || ($currentListLength * 2 >= $itemSum && $fieldSum < $maxColumns) // #15579 ... or outnumbered facets
+									? $columnSize * 2 : $columnSize;
+								
+								// Special case: custom URLs for collections...
+								$moreUrl = $field == 'hierarchy_top_title'
+									? $this->url('collections-home') : $this->url($advSearch);
+								
+							?>
+							<?php $i = 0; foreach ($sortedList as $url => $value):
+								// Special case: custom URLs for collections...
+								if ($field == 'hierarchy_top_title') {
+									$url = $this->url('collections-bytitle') . '?title=' . urlencode($value);
+								}
+							?>
+              <li><a href="<?=$url?>"><?=$this->escapeHtml(empty($value) ? '-' : $value)?></a></li>
+							<?php if (++$i >= $currentListLength) break; // end of list? bail out! ?>
+							<?php if ($i >= $maxListLength): // list too long? show more link! ?>
+                <li><a href="<?=$moreUrl?>"><strong><?=$this->transEsc("More options")?>...</strong></a></li>
+								<?php break; ?>
+							<?php elseif ($i % $columnSize === 0): // end of column? insert break! ?>
+            </ul><ul class="home-facet-list">
+							<?php endif; ?>
+							<?php endforeach; ?>
+            </ul>
+          </div>
+        </div>
+			<?php endif; ?>
+			<?php if ($isHierarchy): // close tag opened in matching if above ?>
+        </noscript>
+			<?php endif; ?>
+		<?php endforeach; ?>
+  </div>
+<?php endif; ?>
+<!-- finc: ContentBlock -- FacetList - END -->
\ No newline at end of file