Item9838: Add a %maint% parameter to the Template.

 - With %twisty% set to off,  the group maintenance forms are all
   included inline.
 - With %maint% set to off, the group maintenance forms are not
   included.

Rendering time for 220 groups chaged from 23 seconds to approx. 4
seconds.   Left parameter unset by default, but included brief
help text below the Add Group form suggesting the setting.

git-svn-id: http://svn.foswiki.org/trunk@9611 0b4bb1d4-4e5a-0410-9cc4-b2b747904278

core/data/Main/GroupViewTemplate.txt

@@ -34,6 +34,7 @@
   section="%IF{
     "istopic '%USERSWEB%.%groupname%' AND 
      '%groupname%' != 'NobodyGroup' AND
+     '%maint%' != 'off' AND
      '%USERSWEB%.%groupname%' allows 'change'
     " 
     then="changegroup%IF{"'%twisty%' = 'off'" then="notwisty"}%" 

core/data/Main/WikiGroups.txt

@@ -3,6 +3,17 @@
 ---+ Wiki Groups
 This is a list of all known groups that can be used to define [[%SYSTEMWEB%.AccessControl][AccessControl]] in <nop>%WIKITOOLNAME%.
 
+<!--
+If a large number of groups are configured, the rendering performance of this
+page can be significantly improved by enabling the following Set statement.
+(Remove the #)
+
+   * #Set maint=off
+
+With this enabled, the twisties and maintenance forms for each group are omitted
+from this page.  Maintenance can be done from the individual group topics.
+-->
+
 %TWISTY{
   link="<img src='%ICONURLPATH{"persons"}%' /> %MAKETEXT{"Create a new group"}%"
   mode="div"
@@ -38,6 +49,8 @@ This is a list of all known groups that can be used to define [[%SYSTEMWEB%.Acce
    * A topic revision can be undone by a member of the [[%USERSWEB%.AdminGroup][AdminGroup]] if necesssary.
 
 *Related topics:* [[%SYSTEMWEB%.AccessControl][AccessControl]], [[%WEBPREFSTOPIC%]], [[%WIKIUSERSTOPIC%]], [[%SYSTEMWEB%.WikiCulture][WikiCulture]]
+
+<blockquote class="foswikiHelp">%X% If a large number of groups are configured, the rendering performance of this page can be significantly improved by disabling group maintenance from this page.  Edit this topic for more information.</blockquote>
     </div>
   </div>
 </div>