Missing error/warning markers on instance model elements

[lwrage]

Summary
Instance editor and AADL navigator no longer show any error or warning markers on instance objects.

This used to work in OSATE 2.9.0.

Steps To Reproduce

1. Add model below in an AADL project
2. Instantiate S.i
3. Open instance model in instance editor
4. Expand instance model in navigator

package Issue2612
public
	
	system S
	end S;
	
	system implementation S.i
		subcomponents
			l: system L;
			m: system M.i;
			r: system R;
		connections
			lm: feature l.o -> m.i;
			mr: feature m.o -> r.i;
		flows
			ee: end to end flow l.src -> lm -> m.pth -> mr -> r.snk;
	end S.i;
	
	system L
		features
			o: out feature;
		flows
			src: flow source o;
	end L;
	
	system M
		features
			i: in feature;
			o: out feature;
		flows
			pth: flow path i -> o;
	end M;
	
	system implementation M.i
		subcomponents
			mm: system M;
		connections
			imm: feature i -> mm.i;
	end M.i;
	
	system R
		features
			i: in feature;
		flows
			snk: flow sink i;
	end R;
	
end Issue2612;

Screenshots
OSATE 2.9.1:

OSATE 2.9.0:

Desktop (please complete the following information):

• OSATE Version: 2.9.1
• Operating System: Linux, Windows

Additional context
Maybe caused by the fix to #2430.

[AaronGreenhouse]

Same problem as Issue #2609. Fix for 2609 fixes this too.

[lwrage]

Only navigator markers are #2609. Missing markers in the instance editor are the main issue. This is caused by switching back to the EMF generated model editor which doesn't have that functionality.