TableEditor: initialise events with is_event=True

[chnce]

Checklist

• Initialise Events in TableEditor with is_event=True in order to avoid the error below in "sync_value"

  File "/Users/nino/Repos/traitsui/traitsui/editor.py", line 513, in raise_to_debug
    yield
  File "/Users/nino/Repos/traitsui/traitsui/editor.py", line 398, in sync_value
    editor_value = xgetattr(self, editor_name)
                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/nino/micromamba/envs/more_pyside/lib/python3.11/site-packages/traits/trait_base.py", line 319, in xgetattr
    return getattr(object, names[-1])
           ^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: The dclick trait of a TableEditor instance is an 'event', which is write only.

[corranwebster]

Thanks for the error report and contribution. Assuming that the tests pass this looks basically OK.

It looks like there may be a corresponding error in the Wx version of the code:

traitsui/traitsui/wx/table_editor.py

Lines 279 to 282 in a00f0c3

	sv = self.sync_value
	is_list = mode[-1] == "s"
	sv(factory.click, "click", "to")
	sv(factory.dclick, "dclick", "to")