Improve Pen tool handle dragging with Tab swapping, Ctrl angle locking, and directly dragging the closing endpoint in handle

editor/src/messages/input_mapper/input_mappings.rs

@@ -254,6 +254,7 @@ pub fn input_mappings() -> Mapping {
 		//
 		// PenToolMessage
 		entry!(PointerMove; refresh_keys=[Control, Alt, Shift, KeyC], action_dispatch=PenToolMessage::PointerMove { snap_angle: Shift, break_handle: Alt, lock_angle: Control, colinear: KeyC, move_anchor_with_handles: Space }),
+		entry!(KeyDownNoRepeat(Tab); action_dispatch=PenToolMessage::SwapHandles),
 		entry!(KeyDown(MouseLeft); action_dispatch=PenToolMessage::DragStart { append_to_selected: Shift }),
 		entry!(KeyUp(MouseLeft); action_dispatch=PenToolMessage::DragStop),
 		entry!(KeyDown(MouseRight); action_dispatch=PenToolMessage::Abort),

editor/src/messages/tool/tool_messages/path_tool.rs

@@ -1468,7 +1468,7 @@ impl Fsm for PathToolFsmState {
 				let drag_anchor = HintInfo::keys([Key::Space], "Drag Anchor");
 				let toggle_group = match dragging_state.point_select_state {
 					PointSelectState::HandleNoPair | PointSelectState::HandleWithPair => {
-						let mut hints = vec![HintInfo::keys([Key::Tab], "Swap Selected Handles")];
+						let mut hints = vec![HintInfo::keys([Key::Tab], "Swap Dragged Handle")];
 						hints.push(HintInfo::keys(
 							[Key::KeyC],
 							if colinear == ManipulatorAngle::Colinear {