Code cleanup.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11958 e93f8b46-1217-0410-a6f0-8f06a7374b81
Adds Watcher.any_watched? to check if at least one object of a collection is watched.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11959 e93f8b46-1217-0410-a6f0-8f06a7374b81
Code cleanup.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11960 e93f8b46-1217-0410-a6f0-8f06a7374b81
Use #find_issues as before filter for issues context menu.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11961 e93f8b46-1217-0410-a6f0-8f06a7374b81