TabularEditor selected doesn't sync with removals

I'm not sure if this is a bug or intended behavior. Anyhow, if you have a List, represented in a View by a TabularEditor with selected configured on the TabularEditor, then the selected trait doesn't sync with removals from the list. This results in ghost selections. This is better illustrated by example:

```python
from traits.api import *
from traitsui.api import *

class Foo(HasTraits):
x = Str()

def __repr__(self):
return f''

class FooContainer(HasTraits):
foos = List(Instance(Foo))
selected = List
delete_selected = Button

def _foos_default(self):
return [Foo(x=str(i)) for i in range(10)]

def _delete_selected_fired(self):
self.foos = [f for f in self.foos if f not in self.selected]

@on_trait_change('selected[]')
def _say_hi(self, obj, name, old, new):
print('hi', old, new)

traits_view = View(
UItem('delete_selected'),
UItem(
'foos',
editor=TabularEditor(
selected='selected',
multi_select=True,
adapter=TabularAdapter(
columns=[('x', 'x')]
)
)
)
)

FooContainer().configure_traits()
```

Of course, you can include something like:
```python
@on_trait_change('foos[]')
def _handle_selected_removal(self):
# Get all selections that aren't in the list any longer...
removals = [foo for foo in self.selected if foo not in self.foos]
# ... and remove them from the selection.
self.selected = [foo for foo in self.selected if foo not in removals]
```
to get this to work, but I'm not sure if this is intended to be handled by TabularEditor itself.