BBcode plugin: Support of subdirectories for image and file selection

[Fraenkiman]

Hello everyone,

whitecat from the support forum would like to be able to select files and images from subdirectories.

This would require extending the plugin_bbcode_init_toolbar() function. https://github.com/flatpressblog/flatpress/blob/2d1c4173bc3c65c2318b1c9758bed9337321322a/fp-plugins/bbcode/plugin.bbcode.php#L799

Best regards Frank