Where a normal mouse click on a currently open(not necessarily in view) launcher instance brings that current instance to view, And right click - start new instance launches a new instance. The middle mouse click should be a shortcut for "Start New Instance" command. Its very nice for usability, especially with dolphin, chrome, etc when you can have tabs open in th same application, but sometimes want a new instance, this makes it a lot quicker to do so. Devs will probably benefit the most. Reproducible: Always Steps to Reproduce: 1. Middle mouse click on launcher that has an active launcher instance Actual Results: Toggles visibility of launcher instance (same as left mouse click) Expected Results: Open new launcher instance.
You can configure what should happen when middle clicking (including starting a new instance) in the applet's settings.