Fix RTL rendering of SELECT on macOS and input[type=color] on all platforms.

We had two issues.

* 'menulist' and 'menulist-button' appearances were not RTL-aware on macOS
  They are used for <select> and <input type=color list>.
  They were always rendered in LTR.

* Paddings of <input type=color list> were not RTL-aware on all platforms.

This CL fixes them.

BUG=232333

Review-Url: https://codereview.chromium.org/2224883002
Cr-Commit-Position: refs/heads/master@{#410534}
18 files changed