Merge pull request #1 from olimpiurob/master

Add font awesome icons for Workflow Steps Trail Progress Bar
Refs #17711 EEA; Fixed tests after the addition of eea.icons
Refs #17711 EEA; Fixed pylint warnings
Added custom css classes for each state in Workflow Steps Trail Progress bar
Refs #17873; Fixed Workflow Steps Trail progress bar for Collections
Refs #17873 EEA; Fixed progressbar failing for Collections containing objects with no
workflow