Removed code that toggles link display. Not actually supported and broken in core.
Merge pull request #37 from drupal-media/remove-link-modification

Removed code that toggles link display.
Restrict access to the entity_reference_entity_view formatter if the entity type does not support a view controller.
Added missing AccountInterface use statements.
Added EntityHelperTrait to reduce code duplication.
Use EntityHelperTrait on the CKEditor forms which adds validation to the first step of the form if an invalid entity is selected.
Initial test of multistep dialog workflow.
Fixed error messages not shown if nothing selected on the 'select' embed step.
Reverted removal of EntityEmbedCKEditorEmbedForm::validateForm().
Added documentation for EntityHelperTrait.
Fix errors not displayed if entity type not selected. Check $entity->access() when the user embeds the entity.
Moved the file access workaround to the EntityHelperTrait.
Merge branch 'entity-manager-helper' into dialog-multistep-form

Conflicts:
	src/Form/EntityEmbedCKEditorSelectForm.php
Fixed errors in EntityHelperTrait::entityAccess().
Merge branch 'entity-manager-helper' into dialog-multistep-form
Added docs for accessEntity().
Added docs for accessEntity().
Merge pull request #34 from drupal-media/entity-manager-helper

Added EntityHelperTrait to help with common entity-related code.
Merge branch '8.x-1.x' into dialog-multistep-form
Removed unnecessary use statements.