Please note second line on the screenshot , how can this be inhibited

[p1probe]

Please advise on how this second second line under file  be inhibited from showing with all the emails that scroll horizontally though all the email to reach the home folder of the email. 

[siffemcon]

@p1probe, support requests aren't allowed here. Please post your question with full details at  https://support.mozilla.org/en-US/questions/new/thunderbird.