Normal behavior :
-When we click on a segment, it is selected : ok
-When we click outside (not on a segment), it deselect current selected : ok

Description of my suggestion :
-When we select multiple segments with holding "ctrl" key, and we accidentally select outside, it deselect all.

I think it can be better to not unselect all if we have "ctlr" key held down.

This can prevent losing a selection if we accidentally click outside.