Fix options for select and grid components.

Allow a overriding a property’s weight in the component’s map.

Only invoke webform_edit_form once per configuration form

Ensure webform properties are loaded by using `form_load_include()`.

Fix clientside_validation warnings.

Make properties form type specific

Allow other modules to alter the component edit form.

This invokes `hook_form_alter()` and
`hook_form_webform_component_edit_form_alter()` in a similar as the form
API would do.

Make palette scrolling more accurate and readable.

Switch to PSR-4 autoloading. Remove deprecated code.

Fix handling of webform form-keys.