Merge pull request #314 from emorency/feature/OPAL-2053-delete-selected-tables

OPAL-2053: Delete selected tables
OPAL-2054: Call onDelete on table listeners when deleting a project
Merge pull request #315 from emorency/feature/OPAL-2054-delete-project-listeners

OPAL-2054: Call onDelete on table listeners when deleting a project
PMD fixes
OPAL-2055
OPAL-2054, OPAL-2053: Changing icon from remove to trash
Merge pull request #316 from emorency/master

OPAL-2054, OPAL-2053: Changing icon from remove to trash
OPAL-2053: Drop view through ViewManager