Bug fix: when clicking on the chat window to give focus to the input zone, ignore other button than left button.
Bug fix: when clicking on the chat window to give focus to the input zone, ignore other button than left button.

git-svn-id: 14496471c1e7f47aed4ccd4e743787d9efef7a8c@598 2772adf2-ac07-0410-9d30-e29d8120292e

bright-sparks/phpfreechat,MingJen/phpfreechat,MingJen/phpfreechat,bright-sparks/phpfreechat,kerphi/phpfreechat,jahanzaibbahadur/phpfreechat,kerphi/phpfreechat,jahanzaibbahadur/phpfreechat,bright-sparks/phpfreechat,MingJen/phpfreechat,jahanzaibbahadur/phpfreechat