Bug 871852 - [Email] Email sending fails silently when sending large (for an email) files (ex: 25 MB), No limit on max attachments size

Bug 871852 - [Email] Email sending fails silently when sending large (for an email) files (ex: 25 MB), No limit on max attachments size
Merge pull request #10013 from leob2g/Bug_871852_Email_Composer_Max_Attachments_Size

Bug 871852 - [Email] Email sending fails silently when sending large (fo... r=asuth