Add button for tag selection to entry editor.

Only displayed if freetag plugin is installed.

References #188

templates/2k11/admin/entries.tpl

@@ -64,6 +64,9 @@
     <div id="edit_entry_submit">
         <button id="reset_timestamp" class="button_link" type="button" href="#serendipityNewTimestamp" data-currtime="{$entry_vars.reset_timestamp|@formatTime:'o-m-d\TH:i':true:false:true}" title="{$CONST.RESET_DATE_DESC}"><span class="icon-clock"></span><span class="visuallyhidden"> {$CONST.RESET_DATE}</span></button>
         <a id="select_category" class="button_link icon_link" href="#edit_entry_category" title="{$CONST.CATEGORY}"><span class="icon-list-bullet"></span><span class="visuallyhidden">{$CONST.CATEGORIES}</span></a>
+    {if $has_freetag}
+        <a id="select_tags" class="button_link icon_link" href="#edit_entry_freetags" title="{$CONST.PLUGIN_EVENT_FREETAG_MANAGETAGS}"><span class="icon-tag"></span><span class="visuallyhidden">{$CONST.PLUGIN_EVENT_FREETAG_MANAGETAGS}</span></a>
+    {/if}
         <input class="entry_preview" type="submit" value="{$CONST.PREVIEW}">
         <input type="submit" value="{$CONST.SAVE}">
     </div>