update window-icons/window-icons.patch

[laur89]

• note currenlty only works nicely when title_align=left (default);
  could be modified to support centered- and right alignment, but not
  going to for the sake of keeping the patch as simple as possible.

[ashinkarov]

Thanks for the contribution, a few minor notes though:

1. Could you add a bit of an explanation to your label swapping patch? I can't see why such a patch would be useful, but maybe a small doc would help. Either in the patch itself or in the README.md.
2. For both patches, can you add a note on the i3 version that these patches were successfully applied to. For example, the window patch doesn't apply to 4.17.1.

[laur89]

Will do later when I have more time.

I can't see why such a patch would be useful, but maybe a small doc would help

{v,h}split seem to have different definitions.
I'm used to the one vim (any many other programs) use, where vertically-split entity means the splitting line itself is vertical; having to deal with both ways doesn't play nice with my thinking.