TMSS-579 - Implemented delete SU and tasks

SAS/TMSS/frontend/tmss_webapp/src/App.js

...TMSS/frontend/tmss_webapp/src/layout/sass/_viewtable.scss

...d/tmss_webapp/src/routes/Scheduling/SchedulingUnitList.js

...d/tmss_webapp/src/routes/Scheduling/ViewSchedulingUnit.js

SAS/TMSS/frontend/tmss_webapp/src/routes/Scheduling/index.js

.../frontend/tmss_webapp/src/routes/Scheduling/sub.create.js

SAS/TMSS/frontend/tmss_webapp/src/routes/Task/view.js

...MSS/frontend/tmss_webapp/src/services/schedule.service.js

SAS/TMSS/frontend/tmss_webapp/src/services/task.service.js