Krougal

They need to be fully fed to be broody. I am not 100% if that means you need to continue feeding them or not. Whereas the ewe or sow will stop eating once she is preggers.
It seems to be very inconsistent, although I have noticed that you need to make sure to get the chicks out of the pen with the trough, because they will eat up the food and it doesn't benefit their growth rate, so it is a waste.
The roosters seem to eat just to get up to weight and then they stop, but I am not positive on that either, and of course you can just keep them locked up nearby.

It needs to be sealed off, if you are digging it open, it is no longer a cellar at that moment.
Dig out enough room for yourself in there and seal the roof over and you should see the timers change.
 

Some server settings don't take effect on an already existing character.
I believe this is one of them. You can run individual player commands on those characters, or nuke them out of existence and let them create a new one.
The wiki is pretty helpful on this.
 

Nope.
Yeah, I know it is annoying when you've got 2l of tannin left and you want to mix some more but you have to get another barrel, but that's the way it is.

I believe it does. I've found it not worthwhile to wait for them. Better to just get the seeds and get to farming.
You don't get full drops out of wild crops anyway. Now in 1.19.8 you can still cheat and plow the ground under them to make them yield full but that was fixed in 1.20 so abuse it if you wish, but don't get used to it.

Uninstall first (uninstaller or add/remove programs)
Assuming you took default paths for install, delete "C:\Users\%username%\AppData\Roaming\Vintagestory"
Your mods and save games will be under the Data folder so I'd rename it instead of delete it "C:\Users\%username%\AppData\Roaming\VintagestoryData"
 

You can't make glass out of sand in VS, only quartz as far as I know.
Maybe you forgot you've got a mod?
Sand is used for mortar and panning, that's about it.