Set proper icons for FileDialog in editor theme

editor/editor_themes.cpp

@@ -1106,6 +1106,9 @@ Ref<Theme> create_editor_theme(const Ref<Theme> p_theme) {
 
 	// FileDialog
 	theme->set_icon("folder", "FileDialog", theme->get_icon("Folder", "EditorIcons"));
+	theme->set_icon("parent_folder", "FileDialog", theme->get_icon("ArrowUp", "EditorIcons"));
+	theme->set_icon("reload", "FileDialog", theme->get_icon("Reload", "EditorIcons"));
+	theme->set_icon("toggle_hidden", "FileDialog", theme->get_icon("GuiVisibilityVisible", "EditorIcons"));
 	// Use a different color for folder icons to make them easier to distinguish from files.
 	// On a light theme, the icon will be dark, so we need to lighten it before blending it with the accent color.
 	theme->set_color("folder_icon_modulate", "FileDialog", (dark_theme ? Color(1, 1, 1) : Color(4.25, 4.25, 4.25)).linear_interpolate(accent_color, 0.7));