Replace the "ok" in M280, M301, M304, M851 with output not including …

[AnHardt]

…an "ok"

Replace the "ok" in M280, M301, M304, M851 with output not including an "ok"
to avoid senting two "ok"s for a single g-code.

Doing the same for M105 would break the input filters of the hosts.
For M105 the other "ok" is omitted.
#2911 #2950

[thinkyhead]

This is fine to merge now. Do we have a similar patch for the MarlinDev branch yet?

[AnHardt]

@thinkyhead
No we have not.
My experience over the last few month is that non of my PRs was merged, but i had to update/rebase them constantly. I'm not mad enough anymore to do that also in different repositorys.

[thinkyhead]

I'm not mad enough anymore to do that also in different repositories.

I might be just insane enough to do it, even for PRs that I didn't make. I think it's worth making a PR, even if it never gets rebased/merged, if only as a placeholder to remind us that the patch is needed. (It's easier to find a PR than an Issue.) But, I have also occasionally just compared the two code-bases to made a PR with all the differences that aren't already in a PR, and that continues to work as a fine strategy, since the code is mostly the same right now.

[AnHardt]

@thinkyhead
Since you are back, i'm not that hopeless anymore.

[thinkyhead]

Since you are back, i'm not that hopeless anymore.

I had to take a break and let the chips fall where they may, but I hoped that the best contributors would not fly away, as so many others have. I'm glad to find you still here fighting the good fight!