Set sp-navigate-consider-symbols to nil

Use regular `w` to jump from symbol to symbol
Bind sp-foward-symbol to `w`
Add forward/backward symbol binding to `L` and `H` respectively
Set sp-navigate-reindent-after-up to nil

Seems buggy, it deletes the most nested sexp when
sp-backward-up-sexp
Add sp-(backward)-delete-char bindings to `x` and `X`