implement scaling methods in production portal

[arlin]

Push the scaling functionality from the dev portal to the production portal.

Hide SDM until #320 is fixed.

Note that there are two other changes to scaling that need to be fixed in the development branch: #324 (fix median scaling method) and #299 (scale bar fixes)

[ducvan0212]

The portal uses WebSocket (ActionCable in Rails) to asynchronously update the interface when a scaling process is finished (basically, update the waiting circle to clickable radio box). Unfortunately, ActionCable is currently not supported on Apache + Passenger (https://www.phusionpassenger.com/library/config/apache/action_cable_integration/). I need to stop Apache to try 2 approaches:

• Install Nginx and use Nginx instead of Apache
• https://www.phusionpassenger.com/library/deploy/standalone/reverse_proxy.html

For now, I don't have permissions to stop all Apache processes because @abusalehmdtayeen needs Apache to run his services.

Otherwise, the production portal will still works, but user has to reload the tree viewer (refresh the page) to view scaling options.

[arlin]

I'm closing this. good job, @ducvan0212 and @abusalehmdtayeen