Refactor Toogle Button, Organize Theme Resource to AppConstants, Created CustomLabel for Headers with Icons
Merge branch 'listmanager_sidebyside' of https://github.com/digitalabs/BreedingManager into listmanager_sidebyside

Conflicts:
	src/main/java/org/generationcp/breeding/manager/listmanager/SearchResultsComponent.java
	src/main/java/org/generationcp/breeding/manager/listmanager/sidebyside/BuildNewListComponent.java