Make name column larger in tasks grid
[NX-605] Disable settings tab when schedule is internal
[NX-605] Hide Schedule tab when schedule type is "internal"
[NX-607] Do not show Settings/Schedule tabs if task is not exposed (task type not available)
[NX-608] Match PurgeTimelineTask descriptor id with task class name
Merge pull request #653 from sonatype/fix-tasks-ui-bugs

REVIEW: Tasks UI related fixes