Implemented a feature that give a project and optional default context. When set,

this context will be pre-populated when creating an action from the project's page.
When creating an action from the home page, the context will be auto-selected when
the project is selected if the context field has not yet been entered.

This implementation is a combination of the great patch submitted by James Kebinger
(thanks James!) and some of my modifications and additions.

Don't forget to rake db:migrate.

Fixes #162, originally suggested by Rolf one year ago!

Also in this commit:

 * Tweaked selenium tags test
 * Tweaked formatting of next/previous project HTML
 * Implemented Null Object pattern for context to support
   a Project having no default context
 * Removed tickler.rhtml, no longer in use
 * applying z-index values to project sortable list items (otherwise context
   autocomplete was appearing below next list item)
 * Swapped order of project and context in new action form (setting default context
   makes more sense this way)
 * Removed CSS width of for form elements, so form could be used in content area
   without being too narrow
   


git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@480 a4c988fc-2ded-0310-b66e-134b36920a42

tracks/test/selenium/tags/find_tagged.rsel

@@ -1,6 +1,5 @@
 setup :fixtures => :all
 include_partial 'login/login', :username => 'admin', :password => 'abracadabra'
 open "/todos/tag/foo"
-wait_for_element_present "xpath=//div[@id='t'] //h2"
-assert_not_visible "t_empty-nd"
+wait_for_element_present "xpath=//div[@id='c1'] //h2"
 wait_for_text 'badge_count', '2'

tracks/test/unit/project_test.rb

@@ -192,5 +192,12 @@ class ProjectTest < Test::Unit::TestCase
     @moremoney.todos[0].complete!
     assert_equal 2, @moremoney.not_done_todo_count
   end
+  
+  def test_default_context_name
+    p = Project.new
+    assert_equal '', p.default_context.name
+    p.default_context = contexts(:agenda)
+    assert_equal 'agenda', p.default_context.name    
+  end
 
 end