fixes #2414 change related tags display

Add conf to display or not the related tag options by default
Add templates and css for new display

themes/default/template/include/related_tags.inc.tpl

@@ -0,0 +1,27 @@
+<div class="mcs-side-results search-in-set-button" id="related-tags-toggle">
+  <div>
+    <p>{'Related tags'|translate}<i class="gallery-icon-up-open rotated"></i></p>
+  </div>
+</div>
+
+{foreach from=$RELATED_TAGS item=tag}
+<span class="related-tags {if isset($RELATED_TAGS_DISPLAY) and $RELATED_TAGS_DISPLAY == false} hide{/if}">{strip}
+  <a class="tagLevel {if isset($tag.level)}{$tag.level}{/if}" href=
+  {if isset($tag.U_ADD)}
+    "{$tag.U_ADD}" title="{$tag.counter|@translate_dec:'%d photo is also linked to current tags':'%d photos are also linked to current tags'}" rel="nofollow">
+  {else}
+    "{$tag.URL}" title="{'display photos linked to this tag'|@translate}">
+  {/if}
+    + {$tag.name}</a><div class="tag-counter">{$tag.counter}</div></span>{/strip}
+{/foreach}
+
+{footer_script require='jquery'}
+
+$(document).ready(function () { 
+  $('#related-tags-toggle').on("click", function (e) { 
+    $('.related-tags').toggle();
+    $('#related-tags-toggle .gallery-icon-up-open').toggleClass('rotated'); 
+  }); 
+});
+
+{/footer_script}

themes/default/template/include/selected_tags.inc.tpl

@@ -0,0 +1,14 @@
+<span id="selected-tags-container">
+
+{foreach $SELECT_RELATED_TAGS as $TAG}
+  <span class="selected-related-tag">
+    <a href="{$TAG.index_url}" title="{'display photos linked to this tag'|translate}">
+      {$TAG.tag_name}
+    </a>
+    <a class="selected-related-tag-remove" href="{$TAG.remove_url}" style="border:none;" title="{'remove this tag from the list'|translate}">
+      <i class="gallery-icon-cancel"></i>
+    </a>
+  </span>{if !$TAG@last}<span class="related-tag-condition">+</span>{/if}
+{/foreach}
+
+</span>