Refactor: change :id on WikiController to use :project_id

Using :id to track projects on non-project controllers is confusing and
makes routing with resources difficult.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4265 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/wiki/edit.rhtml

@@ -10,7 +10,7 @@
 
 <p><%= submit_tag l(:button_save) %>
    <%= link_to_remote l(:label_preview), 
-                       { :url => { :controller => 'wiki', :action => 'preview', :id => @project, :page => @page.title },
+                       { :url => { :controller => 'wiki', :action => 'preview', :project_id => @project, :page => @page.title },
                          :method => 'post',
                          :update => 'preview',
                          :with => "Form.serialize('wiki_form')",