Slight adjustment to the code to determine if a table cell in the message header list is a checkbox or not.
Slight adjustment to the code to determine if a table cell in the
message header list is a checkbox or not.

chrys87/orca-beep,pvagner/orca,GNOME/orca,pvagner/orca,GNOME/orca,h4ck3rm1k3/orca-sonar,chrys87/orca-beep,chrys87/orca-beep,GNOME/orca,chrys87/orca-beep,pvagner/orca,h4ck3rm1k3/orca-sonar,pvagner/orca,h4ck3rm1k3/orca-sonar,GNOME/orca