Refactor and avoid complexity of methods

Problem/Motivation

Few methods of module are too complex with lot of conditions. We need to reduce the general complexity of module to do that two refactor techniques are usefull :

1. Decompose Conditional
2. Extract Method

Proposed resolution

Fix following Methods too complex :

• CropWidgetForm::validateForm()
• image_widget_crop.module::image_widget_crop_library_info_alter()
• ImageCrop::validateHardLimit()
• ImageCropWidget::settingsSummary()