[OS X] When right clicking to trigger a new dialog then the mouse buttons end up out of sync and can cause a mouse press to occur without pushing the button

[OS X] When right clicking to trigger a new dialog then the mouse buttons end up out of sync and can cause a mouse press to occur without pushing the button.

The attached example shows a case of this, right click on the label and then close the messagebox, then move the mouse into the textedit and it will get a mouse press event.