Add emailId property to FOAMGMailMessage for id mapping.
Add emailId property to FOAMGMailMessage for id mapping.

foam-framework/foam,mdittmer/foam,jlhughes/foam,foam-framework/foam,foam-framework/foam,mdittmer/foam,foam-framework/foam,jlhughes/foam,jlhughes/foam,foam-framework/foam,jlhughes/foam,mdittmer/foam,mdittmer/foam