Use type="button" instead of return false; (#17401).

Patch by Daniel Felix.

git-svn-id: http://svn.redmine.org/redmine/trunk@13326 e93f8b46-1217-0410-a6f0-8f06a7374b81
Typo (#17400).

Patch by Daniel Felix.

git-svn-id: http://svn.redmine.org/redmine/trunk@13327 e93f8b46-1217-0410-a6f0-8f06a7374b81