Selectable list

Create a list where elements are selectable, like in file-managers.

A click on a list element selects only that element (adds the class .selected), deselects all others.
If a click is made with key:Ctrl (key:Cmd for Mac), then the selection is toggled on the element, but other elements are not modified.

The demo:

[iframe border="1" src="solution" height=180]

P.S. For this task we can assume that list items are text-only. No nested tags. P.P.S. Prevent the native browser selection of the text on clicks.