Grid row expand/collapse icons

Change from png to Fontawesome icons
Increase icons to 14px
Increase area icons size
Merge remote-tracking branch 'upstream/pr/11687' into pr/11687-2

* upstream/pr/11687:
  Increase area icons size
  Increase icons to 14px
  Grid row expand/collapse icons

Conflicts:
	_build/templates/default/sass/_xtheme-modx.scss