Easy Updates Manager Premium 9.0.19

* TWEAK: (Premium) New ability of the automatic update scheduling feature where now the user can individually select what days are allowed or not allowed for updates to be run on the 3, 6, 12 hours and daily schedule settings
* FIX: MPSUM_Logs::normalise_call_stack_args() would overwrite any arguments that were passed by reference (pointer variables). thus resulting in misleading or seriously wrong data

* TWEAK: Improve MPSUM_Logs::normalise_call_stack_args() method to reduce the size of call stacks being stored in the database, also to prevent silent termination due to size of the call stacks that swell
* TWEAK: Get rid of PHP 8.1+'s "automatic conversion of false to array is deprecated" message when first time activating the plugin
* TWEAK: Add a user capabilities check when receiving a request through the `wp_ajax_eum_ajax` handler
* TWEAK: Prevent PHP8+ ErrorException and/or suppress PHP notice/warning for undefined stdClass:plugin and/or stdClass:theme variables during auto-updates (this usually happens due to the plugin or theme doesn't follow WordPress standards)
* TWEAK: Remove notices regarding WP_AUTO_UPDATE_CORE and AUTOMATIC_UPDATER_DISABLED constants from force automatic updates screen as they now won't prevent automatic updates from being run
* TWEAK: Get rid of PHP deprecated message on PHP 8.1+ when presenting admin constant notices by removing sprintf() function that shouldn't had wrapped the esc_html_e() function
* TWEAK: All updates settings should be compatible and compliant with WordPress Site Health
* TWEAK: Prevent making a nonce available to logged-in users who could not manage Easy Updates Manager (no impact as all actions (dismissal of notices) were unreachable without proper user capability)
* FIX: Wrong parameters order in PHP implode() function calls for showing a list of plugins and/or themes that are under version control
* FIX: Some fields were not cleared when switching from one auto-update schedule time to another

* TWEAK: Add admin notice for DISABLE_WP_CRON constant and remove notices regarding WP_AUTO_UPDATE_CORE and AUTOMATIC_UPDATER_DISABLED constants as they now won't prevent automatic updates from being run
* FIX: Core minor updates became major when two updates-related scheduled events got triggered in the same process
* FIX: In some cases the serialisation of call stack could cause a PHP fatal error due to the output of a backtrace (debug_backtrace) containing 'Closure' (anonymous) functions
* TWEAK: Update notice class