Best, Easiest suggestion of ALL Time that will save you time and money - For world editing.

Make a key for locking a selection as in you can not accidently click off of it when locked as selection.

And something could be done to improve the grabbing of handlebars

But clean it up of course... Make skinner. I just sketched this out for idea.
You can gab any handlebar this way no matter the angle your looking at it.

Unless you add hot key for X,Y,Z move, scale, rotate,

 

I rarely use the editor, but I think it would be useful for many