v1.0.12: Refactors GridFilter form and improves handling

Refactors the GridFilter form logic to improve data handling and form element creation.

This change addresses issues with the operator and value sections within the GridFilter form, specifically concerning the dynamic creation of form elements based on selected filter types and operators. By restructuring the code, it enhances the logic that determines which input fields are displayed and how they are populated. This change also fixes a bug where list items were not properly parsed. Furthermore it fixes issue where `save` checkbox's condition does not work due to missing `getHtmlId` call.

Also sets a memory limit to 1G to avoid memory issues.