- admin/cat_options page added : manage options for the whole categories

tree (uploadable, commentable). status and visible will be soon added

- admin.php : $conf_link var to avoid lines longer than 79 characters

- config.upload_available configuration parameter disappear : it's simpler
  to manage with cat_options

- config.show_comments idem : new column categories.commentable, each
  categories can be commentable or not

- categories.site_id becomes a nullable column : a virtual category does
  belong to no site

- function display_select_categories has a new argument : $CSS_classes array
  to optionnaly assign a CSS class to each category in the select field

- added informations in include/config.inc.php for setting default value of :

  - categories.visible
  - categories.status
  - categories.uploadable
  - categories.commentable

- 2 new indexes images_i3(average_rate) and images_i4(hit) : optimizes best
  rated and most visited categories


git-svn-id: http://piwigo.org/svn/trunk@602 68402e56-0260-453c-a942-63ccdbb3a9ee

template/default/default.css

@@ -424,4 +424,36 @@ div.remoteLocal {
 /* for debugging purpose */
 pre {
   text-align:left;
+}
+
+.confMenu {
+  background-color:#444444;
+  text-align:center;
+}
+
+.confMenu a {
+  padding:2px;
+  border:1px solid gray;
+  background-color:#505050;
+  color:#fff48e;
+  color:lightgray;
+}
+
+.confMenu a:hover {
+  color:orange;
+  text-decoration:none;
+}
+
+.confMenu a.opened {
+  background-color:gray;
+  color:white;
+  text-decoration:none;
+}
+
+.optionTrue {
+  color:lightgreen;
+}
+
+.optionFalse {
+  color:#ffe1e1;
 }