2026/10/16 Fixed 5 issues including a problem where label colors could not be changed

The following 5 issues have been fixed.

• Even when selecting a label color such as "Indigo," the color sometimes did not change; it now changes to the selected color correctly.
• The node insertion menu opened from the "+" on an edge did not close when clicking on the canvas margin or elsewhere; it now closes properly.
• When the screen width was changed while a label was open for editing, the position of the editing field would remain misaligned; it now moves to match the screen.
• It was sometimes not possible to start drawing a line from a connection point that another line was crossing; this is now possible.
• In Swimlanes, the lines of collapsed branches would sometimes overlap nodes or pass outside the lane; they now avoid nodes and travel within the lane.