Sketch on an origin plane faces the side you clicked (#1587)

Fixes #1586.

crates/ui-egui/src/lib.rs

@@ -149,6 +149,8 @@ pub mod sketch_modify_ui;
 mod sketch_modify_ui_tests;
 pub mod sketch_palette;
 mod sketch_pattern_tree;
+#[cfg(test)]
+mod sketch_side_ui_tests;
 pub(crate) mod sketch_text;
 mod sketch_text_handles;
 mod sketch_text_move;