Merge pull request #4151 from HassenRiahi/RemoveUnusedViews

Remove unused views.
Remove unused export.
Merge pull request #4157 from HassenRiahi/RemoveUnusedExport

Remove unused export.
Add new views showing files count and size.
Update the monitoring to show also the size of (not)transfered/(not)published files. Improvements to the date/time form in the web page; addition of a Reload-Plots button.
Include Killed status in JobsStatesByWorkflow view.
Merge pull request #4163 from HassenRiahi/IncludeKilledFilesStatesView-1

Include Killed status in JobsStatesByWorkflow view.
Merge pull request #4156 from AndresTanasijczuk/MonitoringUsingNewViews

Monitoring using new views
Merge pull request #4158 from AndresTanasijczuk/NewViewsWithFileSize

Add new views showing files count and size.
Stale view in case they are already cached.
Merge pull request #4164 from HassenRiahi/StaleViews

Stale view in case they are already cached.
Restore the FilesCleaner Component.
Merge pull request #4166 from HassenRiahi/RestoreFilesCleaner

Restore the FilesCleaner Component.
Fix file path for the FilesCleanerView.
Merge pull request #4167 from HassenRiahi/FixFilesCleanerView

Fix file path for the FilesCleanerView.
Restructure the monitor couchapp using WMCore couchskel.
Merge pull request #4165 from AndresTanasijczuk/ASOmonitorBasedOnCouchskel

Restructure the monitor couchapp using WMCore couchskel.
Set FTS3 as default for data transfer.
Merge pull request #4168 from HassenRiahi/SetFTS3AsDefault

Set FTS3 as default for data transfer.
Remove unused views.