Checked again and there is no such scroll bar that you've mentioned above. However, found out that with multiple email address in a row with wrap enabled, if I move my mouse cursor over the header name itself, say Cc:, the icon turn into a hand. Clicking on the header cause the field Cc: to toggle which makes all the email addresses show. This is pretty much a toggle between wrap/un-wrap of the headers. So that solves this mystery.
Some more issues:
1) Without your add-on installed, the normal behavior of the mails with attachments is as follows:
For the emails that has attachments, single or multiple files, you can do a right-mouse click in the attachment window and it pops-up a menu with the options "Save All, Delete All, Detach All" etc.
Now with your add-on installed, for mails which has attachments in it (single or multiple files), when you do a right-mouse click in the attachment window to save them, there is no option for Save, Save All etc?. I can click on the individual file names to save them which is similar to clicking on a html link in a browser. My question is, how to do a Save All etc?. If the user have to click on every attachment file to save them, then this is not practical. Is there a way to add the option of Save, Save All back for attachments?
2) In the Attachment Window, what is the purpose of the "Toggle Select All" button?. Clicking on it don't seem to do anything?. Also the "Options" button listed next to it which when clicked takes the user to the Tools->Options->Attachments window, does not seem to be very useful here. From an end user's perspective, the attachment window do not have much real estate space available and by adding these buttons don't seem to provide any usefulness, rather take way valuable real estate space there.
3) The buttons in the Attachment window: "Pin Attachments", "Toggle Attachment Layout", "Toggle Select All" and "Options" are way too big compared to the window itself and takes away valuable real estate space and look ugly. Please see this screen shot:
http://img691.imageshack.us/img691/5028/tb1c.pngI can't seem to find a way to change them into Icons only like I can do with other menu items. Is there any way to make them show up just as Icons only?. I can hide them using css, but then I'd loose the toggle functionality. Therefore, I'd rather display them, but as icons only.
4) Without your add-on, the splitter between the message header box and the message body automatically adjusts depending upon the size of the message header box (number of lines in it). But with your add-on installed, the splitter do not auto-adjust. Please see:
http://img20.imageshack.us/img20/9264/tb2q.png Notice in this screen shot that there is quite a bit of space between from the Subject to the end of header box. The downside is that, I've to manually select and drag the splitter to see the headers for every single mail. Again, not very practical. Is there a way to fix this?. Thanks