Added Lexicon for Gravatar setting

Resolves #11815
Update _tree.scss

Resolves #11949
Closes #12058
Restores horizontal scrolling to the Resource tree

Fixes #11949

* upstream/pr/12060:
  Update _tree.scss
Merge branch 'master' into develop

Conflicts:
	manager/templates/default/css/index.css
Added Lexicon for Gravatar setting

* origin/pr/12059:
  Added Lexicon for Gravatar setting
Added Lexicon for Gravatar setting

* master:
  Added Lexicon for Gravatar setting