Fix undefined global variable $LEAFLET_LIBRARIES

[fritzmg]

Fixes the following error that happens during cache:warmup under Contao 4.13 and PHP 8:

In LibrariesConfiguration.php line 52:

  [ErrorException]
  Warning: Undefined global variable $LEAFLET_LIBRARIES  


Exception trace:
  at vendor\netzmacht\contao-leaflet-maps\src\Frontend\Assets\LibrariesConfiguration.php:52
 Netzmacht\Contao\Leaflet\Frontend\Assets\LibrariesConfiguration->getIterator() at vendor\netzmacht\contao-leaflet-maps\src\Listener\RegisterLibrariesListener.php:61
 Netzmacht\Contao\Leaflet\Listener\RegisterLibrariesListener->onInitializeSystem() at vendor\contao\contao\core-bundle\src\Framework\ContaoFramework.php:405
 Contao\CoreBundle\Framework\ContaoFramework->triggerInitializeSystemHook() at vendor\contao\contao\core-bundle\src\Framework\ContaoFramework.php:307

Not sure what the original intention with this global was - but for simplicity I decided to let it get initialized in Contao's config.php.

[dmolineus]

The libraries are provided by netzmacht/contao-leaflet-libraries. So it's an issue of the loading order. Instead of defining it here, the setLoadAfter information in the contao plugin should contain, leaflet-libs.

contao-leaflet-maps/src/Bundle/ContaoManager/Plugin.php

Lines 43 to 50 in 097cd5c

	->setLoadAfter(
	[
	ContaoCoreBundle::class,
	NetzmachtContaoToolkitBundle::class,
	NetzmachtContaoPageContextBundle::class
	]
	)
	->setReplace(['leaflet']),