Whenever I LMB (left mouse button / click) on a feature in the feature tree or a part in the part window, a menu pops up.  This mostly just gets in the way.  If I wanted a menu, I would RMB (right?).  Can I please disable this LMB menu?  Anyone have any ideas or bad news (i.e. that it can't be done)?

This is what I'm talking about:

and this:

It just always gets in the way when I'm trying to click other things...

It's kinda similar to this issue:
 

Thanks