gl and related reset selection in select mode

[Omnikar]

vgl no longer extends to the end of the line, and other gotos have stopped working as well.

[archseer]

Looks like a regression from #717

@pbzweihander Your original implementation with always_extend was correct, I forgot that these commands are also used under g where we can't conditionally map them.

[archseer]

(Well, we can but it would need to duplicate the entire goto mode)

[pbzweihander]

I posted fixing PR #739!