Fix deprecated action "sync"

[Varkal]

Hi !

From what i've understand of how your code works, the "sync" action disappeared.

This fix the ability to sync just one entity. I didn't check if there is other mention of it elsewhere in the codebase, this just fix the bug who annoy me :-)

[eXaminator]

Ah, thanks a lot. Seems I missed the grid view. You change looks good, but I'll give it a quick test tonight before I merge it.

[eXaminator]

I have one small change request: Could you please change the commit message a bit? Ideally to something like fix: fix sync of single entries in grid view. I am using semantic release, so this way it will know that this is a bugfix (and create a patch release) and also automatically add the message to the changelog. After that I'm happy to merge this!

[Varkal]

Of course !