Control-c does not stop optimization

[gbruer15]

I think this bit in the line search code catches too many exceptions.

SlimOptim.jl/src/linesearches.jl

Lines 44 to 49 in b9c4cec

	try
	return ls(ϕ, dϕ, ϕdϕ, t, funRef, gtd)
	catch e
	@info "Line search failed"
	return 0, funRef
	end

Specifically, when I'm running an optimization interactively and want to stop it, control-c simply prints that the line search failed and then the optimization continues. Because my forward model takes several seconds to run, I can do another control-c to kill the optimization. But if my forward model was very fast, I may very well get into another line search before I can send the interrupt signal again.

Can I make a PR to add e isa InterruptException && rethrow(e) to this catch?

[mloubout]

I actually have a local change I forgot to push cuz I ran into some small debug issue as well.

    # Line search. Prevents it to throw error.
    try
        return ls(ϕ, dϕ, ϕdϕ, t, funRef, gtd)
    catch e
        if isa(e, LineSearchException)
            @info "Line search failed"
            return 0, funRef
        else
            throw(e)
        end
    end

This way it only continues if the line search ended with no solution. Current one is indeed bad as if any of the f/df/fdf function error it thinks it's just the line search