A right-click on a toolbar button with sub-tools (the small triangle) opens
the flyout and it stays open until a tool in it is chosen or the user clicks
elsewhere. A long press opens it too, and releasing that press no longer
closes it or picks the button's tool.
Root cause: the right-click did open the flyout, but the flyout closes on a
click outside itself, and the release of that same right-click (on the tool
button, outside the flyout) closed it in the same frame. The release of a
long press shorter than egui's click time did the same, and also selected
the button's tool. Clicks on the flyout's own tool button now leave it to
that button.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
25a194cc00