Address toggleActive() and showSublayers() functionality

[dnseminara]

The crux of these CAS issues sort've percolate from having an additional, third tier of functionality. This ticket is more of an overarching notification, rather than an actual implementation of a suggestive fix.

Some starting points are here:

• showSublayers() either needs to be added to sub-sublayers (ports) or account for that use case everytime that appears

  //models.js:608
  
  self.showSublayers = ko.observable(false);

• This fires every time a mouse click happens on the body - but currently, there's no subLayer of a sub-sublayer and produces an error.

  //app.js:189
  
  $(document).on('click', 'body', function(event) {
      var activeLayer = app.viewModel.activeLayer();
      var elm = '.layer.open.dropdown';
      if (activeLayer && (activeLayer.showSublayers() || $(elm).length)) {
        app.viewModel.outsideSubLayer(event, elm);
      }
    });

• Activation of port layers produces weird results with the activeLayer logic and is part of the reason that deactivation of these layers don't work. If a single CAS port has been activated, you'll see that you can't delete them. During the next go around, add two ports and put a debugger within toggleActive ~794. You'll see that activeLayer doesn't behave the same way for both CAS port layers. This may be helpful for ticket [8 hours] Fix Activation/Deactivation Logic #3

  //models.js:794 - in self.toggleActive()
  
  if (layer !== activeLayer && typeof activeLayer !== 'undefined') {
          // are these CAS/VTR layers?

[pollardld]

added to model.js

line:794   typeof activeLayer.parentDirectory == 'Function'

line:801   typeof activeLayer.parentDirectory == 'Function'

added to app.js

line: 189   if (activeLayer && typeof activeLayer.showSublayers == 'function')

To fix errors. will push with other issue fixes