desktop ex: more mnemonic escaping related fixes...
desktop ex: more mnemonic escaping related fixes...

Fix SessionTabWidget::closeView() to strip the mnemonic escape char
and SessionTabWidget::renameView() to escape possible mnemonic.

gdamjan/communi-desktop,communi/communi-desktop,communi/communi-symbian,jpnurmi/communi-desktop,sevanteri/communi-desktop,communi/communi-symbian,communi/communi-symbian,communi/communi-desktop,communi/communi-symbian