Integrated re-order ui for assignments in unit set up.
Merge branch 'dev-branch' of https://github.com/Gooru/Gooru-Web into dev-branch
fixed null issue
"Dashboard changes removed for teacher view."
Validations added for scoreHeder in DashBoard.
Merge remote-tracking branch 'upstream/dev-branch' into dev-branch

Conflicts:
	src/main/java/org/ednovo/gooru/client/mvp/classpages/unitdetails/UnitAssignmentView.java
Merge pull request #1640 from nutan-gooru/dev-branch

fixed null issue
Merge pull request #1641 from mitraj/dev-branch

Validations added for scoreHeder in DashBoard.
Merge pull request #1642 from sravanthi1/dev-branch

"Dashboard changes removed for teacher view."
Added reorder widget for assignment at unitsetup.
Resolved conflicts.

Conflicts:

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

src/main/java/org/ednovo/gooru/client/mvp/classpages/unitdetails/UnitAssignmentView.java
Merge pull request #1639 from VinRudramurthy/dev-branch

Integrated re-order ui for assignments in unit set up.
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/UnitAssignmentPresenter.java
	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