Time of studying ui and validations added.
Merge branch 'dev-branch' of https://github.com/Gooru/Gooru-Web into dev-branch

Conflicts:

src/main/java/org/ednovo/gooru/client/mvp/classpages/unitdetails/UnitAssignmentView.java

src/main/java/org/ednovo/gooru/client/mvp/classpages/unitdetails/UnitAssignmentView.ui.xml
Merge pull request #1706 from mitraj/dev-branch

Time of studying ui and validations added.