MD autocomplete: Use display: block for the popup container; fixes Chrome M45+
MD autocomplete: Use display: block for the popup container; fixes Chrome M45+

This is apparently a paint invalidation bug, and investigation into the source
is underway. Switching the display rules from the default (inline) to block
sidesteps the bug, apparently, so all is well on new Chrome with this patch.

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