Christoph Thiede uploaded a new version of Morphic to project The Inbox: http://source.squeak.org/inbox/Morphic-ct.2057.mcz
==================== Summary ====================
Name: Morphic-ct.2057 Author: ct Time: 26 November 2022, 1:50:40.467518 pm UUID: 0bc53b37-9fd5-9643-8be1-722f0c6fd475 Ancestors: Morphic-ct.2056
Prevents pluggable buttons without a menu from acting on yellow-click. Why did we never notice this earlier? Yellow-click is for menus only ...
=============== Diff against Morphic-ct.2056 ===============
Item was changed: ----- Method: PluggableButtonMorph>>mouseUp: (in category 'event handling') ----- mouseUp: evt
+ evt yellowButtonChanged ifTrue: [^ super mouseUp: evt]. self updateFillStyle: evt. (self containsPoint: evt cursorPoint) ifTrue: [self performAction].!