Show blocker parents for non slot-conflict pkgs.

Show parents for packages involved in blocker conflicts but not
directly involved in slot conflicts, since this information may be
helpful for troubleshooting blocker conflicts. This information had
been hidded when there were unrelated simultaneous slot conflicts,
since commit 77b651300731ec007cd535a83b8ee9a898602783.
diff --git a/pym/_emerge/depgraph.py b/pym/_emerge/depgraph.py
index c988ee6..cb7d3d6 100644
--- a/pym/_emerge/depgraph.py
+++ b/pym/_emerge/depgraph.py
@@ -6673,10 +6673,18 @@
 		# the reasons are not apparent from the normal merge list
 		# display.
 
+		slot_collision_info = self._dynamic_config._slot_collision_info
+
 		conflict_pkgs = {}
 		for blocker in blockers:
 			for pkg in chain(self._dynamic_config._blocked_pkgs.child_nodes(blocker), \
 				self._dynamic_config._blocker_parents.parent_nodes(blocker)):
+				if (pkg.slot_atom, pkg.root) in slot_collision_info:
+					# The slot conflict display has better noise reduction
+					# than the unsatisfied blockers display, so skip
+					# unsatisfied blockers display for packages involved
+					# directly in slot conflicts (see bug #385391).
+					continue
 				parent_atoms = self._dynamic_config._parent_atoms.get(pkg)
 				if not parent_atoms:
 					atom = self._dynamic_config._blocked_world_pkgs.get(pkg)
@@ -7153,15 +7161,18 @@
 			self._show_circular_deps(
 				self._dynamic_config._circular_deps_for_display)
 
-		# The slot conflict display has better noise reduction than
-		# the unsatisfied blockers display, so skip unsatisfied blockers
-		# display if there are slot conflicts (see bug #385391).
+		unresolved_conflicts = False
 		if self._dynamic_config._slot_collision_info:
+			unresolved_conflicts = True
 			self._show_slot_collision_notice()
-		elif self._dynamic_config._unsatisfied_blockers_for_display is not None:
+		if self._dynamic_config._unsatisfied_blockers_for_display is not None:
+			unresolved_conflicts = True
 			self._show_unsatisfied_blockers(
 				self._dynamic_config._unsatisfied_blockers_for_display)
-		else:
+
+		# Only show missed updates if there are no unresolved conflicts,
+		# since they may be irrelevant after the conflicts are solved.
+		if not unresolved_conflicts:
 			self._show_missed_update()
 
 		self._show_ignored_binaries()