Bug 870320 - [Email]Attachment size and attachments are not aligned properly in email composer


1) Used Span element to provide fix ".cmp-attachments-size" white space and alignment with the ".cmp-attachment-label"

2) adjusted margin top ".cmp-attachment-filesize" to make alignment with ".cmp-attachment-filename"

3) Provide margin for .cmp-attachment-item , to make sure envelope line does not touch with the remove button.

Please review