Issue #2072303 by tim.plunkett: Modernize views_ui().module forms.

...iews_ui/lib/Drupal/views_ui/Form/AdvancedSettingsForm.php

...odules/views_ui/lib/Drupal/views_ui/Form/Ajax/AddItem.php

...odules/views_ui/lib/Drupal/views_ui/Form/Ajax/Analyze.php

...les/views_ui/lib/Drupal/views_ui/Form/Ajax/ConfigItem.php

...iews_ui/lib/Drupal/views_ui/Form/Ajax/ConfigItemExtra.php

...iews_ui/lib/Drupal/views_ui/Form/Ajax/ConfigItemGroup.php

...odules/views_ui/lib/Drupal/views_ui/Form/Ajax/Display.php

...es/views_ui/lib/Drupal/views_ui/Form/Ajax/EditDetails.php

...ules/views_ui/lib/Drupal/views_ui/Form/Ajax/Rearrange.php

...iews_ui/lib/Drupal/views_ui/Form/Ajax/RearrangeFilter.php

...iews_ui/lib/Drupal/views_ui/Form/Ajax/ReorderDisplays.php

.../views_ui/lib/Drupal/views_ui/Form/Ajax/ViewsFormBase.php

...s/views_ui/lib/Drupal/views_ui/Form/BasicSettingsForm.php

...dules/views_ui/lib/Drupal/views_ui/Form/BreakLockForm.php

...es/views_ui/lib/Drupal/views_ui/ViewAddFormController.php

.../views_ui/lib/Drupal/views_ui/ViewCloneFormController.php

...views_ui/lib/Drupal/views_ui/ViewDeleteFormController.php

...s/views_ui/lib/Drupal/views_ui/ViewEditFormController.php

...s/views_ui/lib/Drupal/views_ui/ViewFormControllerBase.php

...iews_ui/lib/Drupal/views_ui/ViewPreviewFormController.php