BUG: Fixing Update Issue with qtComponentItem

- modification method was not emitting a modified signal when being changed
- also simplied the logic to determine if the number of selected components or resources was not valid based on the
item's requirements
- removed onEntitySelect method on the asasociation widget.  It was not being used and was a left over from SMTK 2.x
10 jobs for fixingModifyIssueWithQtComponentItem
Status Job ID Name Coverage
  External
passed cdash

passed ghostflow-branch-check-master

pending smtk@master-junction-osx-shared-release+remus
passed smtk@master-kerbin-windows-shared-release+examples+remus

00:02:20

passed smtk@master-moho-linux-shared-relwithdebinfo+examples+python3+remus+vtk

00:01:28

passed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus

passed smtk@master-moho-linux-shared-relwithdebinfo+examples+remus+vtk

00:01:24

failed smtk@master-praxis-windows-shared-release

00:02:26

pending smtk@master-talosiv-osx-shared-release+examples+matplotlib
running smtk@master-moho-linux-shared-relwithdebinfo+examples+remus

6640:10:54