fix test gl3d buttons for gl3d_scatter-time mock

Author: etpinard

devtools/test_dashboard/test_gl3d.js

@@ -26,7 +26,7 @@ plots['triangle-mesh3d'] = require('@mocks/gl3d_triangle.json');
 plots['snowden'] = require('@mocks/gl3d_snowden.json');
 plots['bunny'] = require('@mocks/gl3d_bunny.json');
 plots['ribbons'] = require('@mocks/gl3d_ribbons.json');
-plots['date-time'] = require('@mocks/gl3d_scatter-date.json');
+plots['scatter-time'] = require('@mocks/gl3d_scatter-date.json');
 plots['cufflinks'] = require('@mocks/gl3d_cufflinks.json');
 plots['chrisp-nan-1'] = require('@mocks/gl3d_chrisp-nan-1.json');
 plots['marker-arrays'] = require('@mocks/gl3d_marker-arrays.json');