Feature 1533: Change "General" by "Options" in Configuration menu.

Change "Default Display" tab by "Guest Settings" tab.
Add display tab in Configuration/Option menu.

Allow to activate/deactivate a lot of display features:

On main page:
# Display only recently posted images
# Sort order
# Display all elements in all sub-categories
# Display a calendar by posted date
# Display a calendar by creation date
# Slideshow

On photo page:
# Show file metadata
# slideshow
# Add this image to your favorites
# Navigation Bar
# Navigation Thumbnails

git-svn-id: http://piwigo.org/svn/trunk@5293 68402e56-0260-453c-a942-63ccdbb3a9ee

picture.php

@@ -716,7 +716,7 @@ if ($page['slideshow'])
   }
   $template->assign('slideshow', $tpl_slideshow );
 }
-else
+elseif ($conf['picture_slideshow_icon'])
 {
   $template->assign(
     array(
@@ -739,10 +739,16 @@ $template->assign(
 
     'U_HOME' => make_index_url(),
     'U_UP' => $url_up,
-    'U_METADATA' => $url_metadata,
+    'DISPLAY_NAV_BUTTONS' => $conf['picture_navigation_icons'],
+    'DISPLAY_NAV_THUMB' => $conf['picture_navigation_thumb']
     )
   );
 
+if ($conf['picture_metadata_icon'])
+{
+  $template->assign('U_METADATA', $url_metadata);
+}
+
 
 //------------------------------------------------------- upper menu management