Use of PRE tag in issue description results in wrapped text (#18464).

git-svn-id: http://svn.redmine.org/redmine/trunk@13659 e93f8b46-1217-0410-a6f0-8f06a7374b81
Error raised on project settings after project wiki is deleted (#18429).

git-svn-id: http://svn.redmine.org/redmine/trunk@13660 e93f8b46-1217-0410-a6f0-8f06a7374b81
Fixed "First argument in form cannot contain nil or be empty" error (#18275).

git-svn-id: http://svn.redmine.org/redmine/trunk@13661 e93f8b46-1217-0410-a6f0-8f06a7374b81