EditorNode now copies all drag and dropped files.

The editor used to only copy drag-dropped files in the File System pane
if the given file was a valid resource, or had a specific file format
(ttf, otf).
With this PR, all drag and dropped files are copied instead, no matter
their extension.

editor/editor_node.cpp

@@ -5122,7 +5122,6 @@ void EditorNode::_dropped_files(const Vector<String> &p_files, int p_screen) {
 
 void EditorNode::_add_dropped_files_recursive(const Vector<String> &p_files, String to_path) {
 	DirAccessRef dir = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
-	Vector<String> just_copy = String("ttf,otf").split(",");
 
 	for (int i = 0; i < p_files.size(); i++) {
 		String from = p_files[i];
@@ -5153,9 +5152,6 @@ void EditorNode::_add_dropped_files_recursive(const Vector<String> &p_files, Str
 			continue;
 		}
 
-		if (!ResourceFormatImporter::get_singleton()->can_be_imported(from) && (just_copy.find(from.get_extension().to_lower()) == -1)) {
-			continue;
-		}
 		dir->copy(from, to);
 	}
 }