A new patch is uploaded on the bases of comments made by Magnus Melin in the comment#23 in the bug. I have tried my best to address all those issues. Let's see what comments I am going to get for this patch. If you need more information about the patch, refer to the bug.
Now, I am looking forward to take a new bug. The new bug is "Thunderbird Session Restore Bug" (459096).
Hopefully, I will get into "Thunderbird Session Restore" bug and will resolve the the bug in the better way than the "attachment Reminder" bug.