Refs #2792: increase font-size for all portal; adjust font-size for navigation widget
Refs #2792: remove blue box from intro text on Documentation page
Refs #2792: add round corners for listing description and chart filters
Refs #2792: synchronise round corners of graphs with those of navigation widget
Refs #2792: highlight available graphs; remove highlight for intro text
Refs #2792: add darker highlight for datasets boxes
Refs #2792: synchronise graph boxes background-color with graph filters color
Refs #2792: different background-color for datasets navigation boxes and graphs nav. boxes