linear-gradient(top...) is outdated

[jonnylink]

Just updated linear-gradient(top...) to linear-gradient(to bottom...) so that postcss autoprefixer will stop losing its mind. Also, that css apparently won't work ;)

warning in ./node_modules/x-editable/dist/bootstrap3-editable/css/bootstrap-editable.css

Module Warning (from ./node_modules/postcss-loader/src/index.js):
Warning

(439:3) Gradient has outdated direction syntax. New syntax is like to left instead of right.

@ ./node_modules/css-loader??ref--5-2!./node_modules/postcss-loader/src??postcss0!./node_modules/resolve-url-loader??ref--5-4!./node_modules/sass-loader/lib/loader.js??ref--5-5!./resources/css/vendor.scss 10:10-191
@ ./resources/css/vendor.scss

[jonnylink]

Any questions/comments about this PR?