[bug]: Deselecting all weekdays in a cron expression (simple view) crashes the GUI

[MiSchroe]

No existing issues.

• [X] There is no existing issue for my problem.

Describe the bug

When deselecting all weekdays in a the simple dialog for a cron expression the GUI crashes.

To Reproduce

1. Open the settings dialog of an adapter that has a cron field, e.g. klf200 adapter.
2. Click '...' to open the dialog.
3. Choose Simple dialog.
4. Uncheck all weekdays.
5. After unchecking the last weekday the GUI crashes.

Expected behavior

The GUI shouldn't crash. Probably it should either display a message to the user that this is an invalid cron expression or disable the checkbox if there is only one left (whichever is easier to implement).

Screenshots & Logfiles

console.ts:40 Error: Expression has only 4 parts. At least 5 parts are required.
(anonymous)	@	console.ts:40
co	@	react-dom.production.min.js:188
a.componentDidCatch.t.callback	@	react-dom.production.min.js:189
Wa	@	react-dom.production.min.js:156
ki	@	react-dom.production.min.js:260
bi	@	react-dom.production.min.js:259
yi	@	react-dom.production.min.js:258
(anonymous)	@	react-dom.production.min.js:282
ws	@	react-dom.production.min.js:280
is	@	react-dom.production.min.js:272
Hl	@	react-dom.production.min.js:127
cs	@	react-dom.production.min.js:273
Le	@	react-dom.production.min.js:52
Qr	@	react-dom.production.min.js:109
qn	@	react-dom.production.min.js:74
$n	@	react-dom.production.min.js:73
r	@	helpers.ts:98

Adapter version

7.1.5

js-controller version

5.0.19

Node version

20.17.0

Operating system

docker (official image - v10.0.0)

Additional context

No response