Added 'Bulk edit' functionality.

This can be done by clicking on the edit link (little pen icon) at the upper-left corner of the issue list.
Most properties can be set (priority, assignee, category, fixed version, start and due dates, done ratio) and a note can be entered.
Only issues of the current project can be selected for bulk edit (subproject issues can't).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@817 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/issues/_list.rhtml

@@ -1,6 +1,11 @@
+<div id="bulk-edit"></div>
 <table class="list">
     <thead><tr>
-        <th></th>
+        <th><%= link_to_remote(image_tag('edit.png'),
+                               {:url => { :controller => 'projects', :action => 'bulk_edit_issues', :id => @project },
+                                :method => :get},
+                               {:title => l(:label_bulk_edit_selected_issues)}) if @project && User.current.allowed_to?(:edit_issues, @project) %>
+        </th>
 		<%= sort_header_tag("#{Issue.table_name}.id", :caption => '#') %>
         <% query.columns.each do |column| %>
           <%= column_header(column) %>
@@ -9,7 +14,7 @@
 	<tbody>
 	<% issues.each do |issue| %>
 	<tr class="issue <%= cycle('odd', 'even') %>">
-	    <td class="checkbox"><%= check_box_tag "issue_ids[]", issue.id, false, :id => "issue_#{issue.id}" %></td>
+	    <td class="checkbox"><%= check_box_tag("issue_ids[]", issue.id, false, :id => "issue_#{issue.id}", :disabled => (!@project || @project != issue.project)) %></td>
 		<td><%= link_to issue.id, :controller => 'issues', :action => 'show', :id => issue %></td>
         <% query.columns.each do |column| %>
           <%= content_tag 'td', column_content(column, issue), :class => column.name %>