Deprecation: #84222- Usage of GridContainer form element

See Issue #84222

Description

The form element GridContainer is useless, buggy and will be removed in v10.

Impact

Usage of the form element GridContainer will trigger a deprecation warning:

Affected installations

All instances who make usage of the form element GridContainer.

Migration

Remove the GridContainer form elements from your form definition and use GridRow child elements only.

Change

type: Form
identifier: test
label: test
prototypeName: standard
renderables:
  -
    type: Page
    identifier: page-1
    label: Step
    renderables:
      -
        type: GridContainer
        identifier: gridcontainer-1
        label: 'Grid: Container'
        renderables:
          -
            type: GridRow
            identifier: gridrow-1
            label: 'Grid: Row'
            renderables:
              -
                defaultValue: ''
                type: Text
                identifier: text-1
                label: Text

to

type: Form
identifier: test
label: test
prototypeName: standard
renderables:
  -
    type: Page
    identifier: page-1
    label: Step
    renderables:
      -
        type: GridRow
        identifier: gridrow-1
        label: 'Grid: Row'
        renderables:
          -
            defaultValue: ''
            type: Text
            identifier: text-1
            label: Text