Reverts the font size and line height of tree nodes to same as 2.2.x

Redoing PR modxcms/revolution#689
Resolving .tree-pseudoroot-node conflict

Nudging context root node and x-btn back into place
Reverts the font size and line height of tree nodes to same as 2.2.x

* origin/pr/11221:
  Resolving .tree-pseudoroot-node conflict
  Reverts the font size and line height of tree nodes to same as 2.2.x