Add Mode Configuration Options

[slannon97]

Please consider adding a settings dialog to configure the available modes to be cycled through. For example, I would find this extremely useful to only cycle between normal and Object Navigation modes. I have no need for the other modes.

[nvda-ru]

Hello.
I join the current request.

Please add to the settings the possibility to choose which modes to use in cyclic switching.

You can add such settings as checkboxes:

1. Object navigation mode
2. Web mode
3. Scan Mode

By default, all items should be checked.

You can choose:
Any one mode.
Any two modes.

If no mode is selected, the user should be informed to select at least one mode when saving the settings.

Thanks a lot for the addon!