Fixes Mage_Eav_Model_Attribute_Data_Date and Mage_Core_Controller_Varien_Action date validations and empty value handling

[massa-man]

Description (*)

Fix to allow clearing the customer DOB in the admin. This PR also fixes some similar issues with other admin controller date management such as Product controller, which does not use a form, but use the _filterDate() and _filterDateTime() helpers in Mage_Core_Controller_Varien_Action, aligning that code with the fixes I did in PR 3752 to the from filters.

Related Pull Requests

• see Fixed Varien_Data_Form_Filter_Date::inputFilter() and Varien_Data_Form_Filter_Datetime::inputFilter() dealing with empty values #3752

Fixed Issues (if relevant)

• fixes Unable to clear/remove customer DOB via admin console #4604

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All automated tests passed successfully (all builds are green)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[sreichel]

Bug confirmed,

Just did a quick ckeck. To solve the issue it only requieres changes to app/code/core/Mage/Eav/Model/Attribute/Data/Date.php.

Why change app/code/core/Mage/Core/Controller/Varien/Action.php?