Outliner/visibility: revert changes for now until we find better solutions.

See T57857 for discussion. This reverts:

"Outliner: Do not gray out empty collections"
4521d3e707.

"Remove eye column from the outliner"
fd16b35997.

Fix/workaround issues in pose and edit mode"
6d2e2e30d5.

"Per view-layer collection visibility"
4de6a210c6.

release/scripts/startup/bl_ui/space_view3d.py

@@ -4078,8 +4078,11 @@ class VIEW3D_PT_collections(Panel):
             sub = row.split()
             subrow = sub.row(align=True)
             subrow.alignment = 'RIGHT'
-            subrow.active = collection.is_visible # Parent collection runtime visibility
-            subrow.prop(child, "hide_viewport", text="", emboss=False)
+            icon = 'HIDE_OFF' if has_visible_objects else 'HIDE_ON'
+            props = subrow.operator("object.hide_collection", text="", icon=icon, emboss=False)
+            props.collection_index = index
+            props.toggle = True
+            subrow.prop(child.collection, "hide_select", text="", emboss=False)
 
         for child in collection.children:
             index = self._draw_collection(layout, view_layer, child, index)