#inner-navigate-event-firing-algorithm: Move "commit steps" and "cancel steps" into separate algorithm

[jnjaeschke]

What is the issue with the HTML Standard?

The #inner-navigate-event-firing-algorithm is already very messy and large. Steps 31 and 32 introduce new sub-algorithms called commit and cancel, which are called several times in the algorithm. Therefore, I would like to propose moving these steps into own algorithms (#inner-navigate-firing-algorithm-commit-steps, #inner-navigate-firing-algorithm-cancel-steps).

cc @farre @noamr @zcorpan

[noamr]

I put them inline because they need things from their encompassing scope and are not called from anywhere else.
But happy to review PRs that change this.