Merge branch 'FTR-44_material-editor' into FTR-50-WORKSPACE-VIEWS
* Fixed go back navigation in material's reading view
Merge branch 'FTR-50-WORKSPACE-VIEWS' of https://github.com/otavanopisto/muikku into FTR-50-WORKSPACE-VIEWS
Merge branch 'FTR-44_material-editor' into FTR-50-WORKSPACE-VIEWS
Merge branch 'FTR-44_material-editor' of https://github.com/otavanopisto/muikku.git into FTR-44_material-editor
Merge branch 'FTR-44_material-editor' of https://github.com/otavanopisto/muikku.git into FTR-44_material-editor
* Moved workspace.js and workspace-materials.js scripts from plugins to
main project 
* Fixed few UI issues
* Updated all workspace class names in css to be inline with design