[5.3] Catch undefined cors options when saving global options

[laoneo]

Summary of Changes

When saving an option on cli, then are undefined property warnings thrown on error reporting maximum.

Testing Instructions

Execut cli/joomla.php config:set debug=1 on the console within the joomla root folder.

Actual result BEFORE applying this Pull Request

The following four warnings are displayed:

Warning: Undefined array key "cors" in /var/www/html/Projects/cms5/administrator/components/com_config/src/Model/ApplicationModel.php on line 748

Warning: Undefined array key "cors_allow_origin" in /var/www/html/Projects/cms5/administrator/components/com_config/src/Model/ApplicationModel.php on line 749

Warning: Undefined array key "cors_allow_headers" in /var/www/html/Projects/cms5/administrator/components/com_config/src/Model/ApplicationModel.php on line 750

Warning: Undefined array key "cors_allow_methods" in /var/www/html/Projects/cms5/administrator/components/com_config/src/Model/ApplicationModel.php on line 751

Expected result AFTER applying this Pull Request

No warnings.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[muhme]

I have tested this item ✅ successfully on edf6bc8

Before applying this PR and if the four cors*-entries are deleted from configuration.php file, the four deprecation warnings are shown. After applying this PR no deprecation warnings are shown anymore and enabling/disabling Debug System continues to work with Joomla Command Line Interface.

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[alikon]

I have tested this item ✅ successfully on edf6bc8

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45103.}

[alikon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/45103.}