Order of arguments to array_merge is incorrect leading to options not being overriden

[codewise-nicolas]

Problem: root_options values that have the same key as in the default root (local) are not overridden.

Example:
'root_options' => array('URL' => 'something')
This wont override the URL attribute.

Cause:
The arguments to array_merge here

laravel-elfinder/src/ElfinderController.php

Line 129 in 03b8bc8

$roots[$key] = array_merge($rootOptions, $root);

are backwards for the intended functionality of allowing $rootOptions to override the $root values.

php's array_merge keeps the values from the last arguments array when there are key collisions.

Fix:
Change the order of the arguments

-            $roots[$key] = array_merge($rootOptions, $root);
+            $roots[$key] = array_merge($root, $rootOptions);