Description of problem:
I closed Terminator while one of the three splits was expanded.

Version-Release number of selected component:
terminator-2.1.3-1.fc38

Additional info:
reporter:       libreport-2.17.11
kernel:         6.4.8-200.fc38.x86_64
cmdline:        /usr/bin/python3 -sP /usr/bin/terminator --layout=ReD
cgroup:         0::/user.slice/user-1000.slice/session-5.scope
uid:            1000
reason:         paned.py:285:wrapcloseterm:AttributeError: 'HPaned' object has no attribute 'is_child_notebook'
executable:     /usr/bin/terminator
type:           Python3
package:        terminator-2.1.3-1.fc38
runlevel:       N 5
exception_type: AttributeError
crash_function: wrapcloseterm
interpreter:    python3-3.11.4-1.fc38.x86_64
comment:        I closed Terminator while one of the three splits was expanded.

Truncated backtrace:
paned.py:285:wrapcloseterm:AttributeError: 'HPaned' object has no attribute 'is_child_notebook'

Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/terminatorlib/paned.py", line 285, in wrapcloseterm
    if self.get_toplevel().is_child_notebook():
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'HPaned' object has no attribute 'is_child_notebook'

Local variables in innermost frame:
self: <paned.HPaned object at 0x7fe4ec2f2040 (terminatorlib+paned+HPaned at 0x55be13fa48a0)>
widget: <terminal.Terminal object at 0x7fe4e84193c0 (terminatorlib+terminal+Terminal at 0x55be13d308d0)>
sibling: <terminal.Terminal object at 0x7fe4e8440140 (terminatorlib+terminal+Terminal at 0x55be13f8be20)>
first_term_sibling: <terminal.Terminal object at 0x7fe4e8440140 (terminatorlib+terminal+Terminal at 0x55be13f8be20)>
cur_tabnum: None
focus_sibling: True