Description of problem:
I tried to right click in terminator to open the context menu.

I currently cannot access the menu anymore - I cannot go to terminator settings anymore

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

Additional info:
reporter:       libreport-2.17.11
exception_type: AttributeError
uid:            1000
interpreter:    python3-3.11.4-1.fc38.x86_64
cmdline:        /usr/bin/python3 -sP /usr/bin/terminator -m
crash_function: get_menu_item_mask
reason:         terminal_popup_menu.py:33:get_menu_item_mask:AttributeError: 'NoneType' object has no attribute 'lower'
executable:     /usr/bin/terminator
kernel:         6.3.12-200.fc38.x86_64
cgroup:         0::/user.slice/user-1000.slice/session-2.scope
type:           Python3
package:        terminator-2.1.3-1.fc38
runlevel:       N 5

Truncated backtrace:
terminal_popup_menu.py:33:get_menu_item_mask:AttributeError: 'NoneType' object has no attribute 'lower'

Traceback (most recent call last):
  File "/usr/lib/python3.11/site-packages/terminatorlib/terminal.py", line 1031, in on_buttonpress
    right_click[0](*right_click[1])
  File "/usr/lib/python3.11/site-packages/terminatorlib/terminal.py", line 1077, in popup_menu
    menu.show(widget, event)
  File "/usr/lib/python3.11/site-packages/terminatorlib/terminal_popup_menu.py", line 270, in show
    item = self.menu_item(Gtk.CheckMenuItem, 'toggle_scrollbar',
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/terminatorlib/terminal_popup_menu.py", line 55, in menu_item
    mask    = self.get_menu_item_mask(maskstr)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/terminatorlib/terminal_popup_menu.py", line 33, in get_menu_item_mask
    maskstr = maskstr.lower()
              ^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'lower'

Local variables in innermost frame:
self: <terminatorlib.terminal_popup_menu.TerminalPopupMenu object at 0x7fb70ca11590>
maskstr: None
mask: 0