Proposal to adapt file compose.css in compose_newwindow plugin

[Jack!]

@Rosali: Please consider to add the following statement again to file compose.css in your compose_newwindow plugin [trunk-r-4098]:

/* Hide the main taskbar */
#taskbar {
   display: none;
}

Microsoft Internet Explorer works fine without it but in Firefox 3.6.10 (Windows) the icons at the menu (top) are only clickable at the baseline of the icon. This is very confusing to Firefox users. Adding the code above solves the issue.

Kind regards,

Jack