MD Toolbar: Fix flex-grow on header
MD Toolbar: Fix flex-grow on header

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