Tweaked sidepart list item padding, Review of #3000

Tweaked sidepart list item padding, Review of #3000

- Scoped padding change to just entity-list-items within the sidebar
  side reduction of right-hand-padding to zero was causing other
  entity-list-items, such as those in the homepage listing, would then
  have no padding.
- Updated styles to use css logical properties to retain support for RTL
  languages such as Arabic, where the whole interface flips around.
  Related: https://css-tricks.com/css-logical-properties-and-values/