Fixed: cross-project issue list should not show issues of projects for which the issue tracking module was disabled.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1907 e93f8b46-1217-0410-a6f0-8f06a7374b81

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git-svn-id: http://redmine.rubyforge.org/svn/trunk@1901 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1900 e93f8b46-1217-0410-a6f0-8f06a7374b81

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git-svn-id: http://redmine.rubyforge.org/svn/trunk@1893 e93f8b46-1217-0410-a6f0-8f06a7374b81

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git-svn-id: http://redmine.rubyforge.org/svn/trunk@1888 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1887 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1885 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1884 e93f8b46-1217-0410-a6f0-8f06a7374b81

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git-svn-id: http://redmine.rubyforge.org/svn/trunk@1881 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1880 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1879 e93f8b46-1217-0410-a6f0-8f06a7374b81

Users who create/reply a topic are automatically added as watchers but are now able to unwatch the topic.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1878 e93f8b46-1217-0410-a6f0-8f06a7374b81

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git-svn-id: http://redmine.rubyforge.org/svn/trunk@1870 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1869 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1868 e93f8b46-1217-0410-a6f0-8f06a7374b81

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1867 e93f8b46-1217-0410-a6f0-8f06a7374b81

* light refactoring

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1866 e93f8b46-1217-0410-a6f0-8f06a7374b81

Catalan translation (#1822), thanks to Joan Duran for contribuition. Some strings has wrong quoting, I fixed that.

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