Add web-app-capable header to gmail app.
Add web-app-capable header to gmail app.

mdittmer/foam,jlhughes/foam,osric-the-knight/foam,jacksonic/foam,foam-framework/foam,jlhughes/foam,osric-the-knight/foam,jlhughes/foam,foam-framework/foam,mdittmer/foam,osric-the-knight/foam,foam-framework/foam,foam-framework/foam,jlhughes/foam,jacksonic/foam,osric-the-knight/foam,jacksonic/foam,foam-framework/foam,mdittmer/foam,mdittmer/foam,jacksonic/foam