ModeButton activates on press instead of press + release

[cassidyjames]

Buttons in GTK typically respond on "clicked" which is a press + release; for example, this lets you drag a window from a button without triggering the button. Granite ModeButtons, however, appear to activate on press only, meaning if you drag a window from a ModeButton, you also press the button.

This affects at least Music and Files with regards to dragging the window, but it's reproducible in Granite Demo's ModeButtons; compare the behavior of the "Clear Selected" button (pressing, then dragging off the button does not activate it) to the ModeButtons (pressing, then dragging off activates anyway).