Reorder parameters for registerContainer

[davidsteeb]

The order of the parameter for registering a new CType could be changed to move the icon to a position after the grid configuration so a minimum configuration can consist of CType, label, description, and grid.

public function registerContainer(
        string $cType,
        string $label,
        string $description,
        array $grid = [],
        string $backendTemplate = 'EXT:container/Resources/Private/Templates/Container.html',
        string $gridTemplate = 'EXT:container/Resources/Private/Templates/Grid.html',
        string $icon = 'EXT:container/Resources/Public/Icons/Extension.svg',
        bool $registerInNewContentElementWizard = true
    ): void

[achimfritz]

grid Parameter should also be mandatory

[ervaude]

Resolved by #26