Simplify sim calls in BuildRefrigerator

* Note that the command to start Simscape Results Explorer is sscexplore
* For the multiple sims, replace with parsim on desktop systems
* For the other sims, do not use Simulink.SimulationInput
* Close the parpool, if open, in PostBuildRefrigerator
* Make sure sim doesn't open sscexplore in PreBuildRefrigerator

Author: eszmw

Models/BuildRefrigerator.mlx

@@ -1,3 +1,5 @@
 %  Post-run script for BuildRefrigerator.mlx
 % ---- Post-run commands -----
+
+delete(gcp('nocreate'))
 

Models/Model_Fridge.mlx

@@ -2,3 +2,19 @@
 % ---- Known Issues     -----
 KnownIssuesID = ["physmod:common:simtypes:assert:Assertion","physmod:simscape:simtypes:assert:Assertion"];
 % ---- Pre-run commands -----
+
+sim = @(varargin) SimNoViewer(varargin);
+
+function out = SimNoViewer(varargin)
+mdl = varargin{1}{1};
+p1 = get_param(mdl,"SimscapeLogOpenViewer");
+set_param(mdl, 'SimscapeLogOpenViewer', 'off')
+out = sim(mdl,varargin{2:end});
+set_param(mdl,"SimscapeLogOpenViewer",p1)
+end
+
+% sscexplore = @(x) DontOpenExplorer(x);
+% 
+% function DontOpenExplorer(varargin)
+% disp("Opening Simscape Results Explorer here...")
+% end