Update settings.phtml

[tronsmit]

Fix for #132

Problem: The value of $tree is passed to media-table view, but its value is the last in the foreach loop over all trees and in some cases will not match the $tree_id resulting in media-table reporting a null value for $media

Fix: set $selectedTree to match the selected $tree and pass that to media-table

Other:

• Did not know if one needs to include use Tree (?)
• fixed tag