Merge further improvements submitted to my fork

[h-v-smacker]

fluxionary greatly improved the code of the mod recently, so I'm propagating these changes to upstream. A lot of redundancy in definitions has been removed overall.

[TumeniNodes]

There's just no way I can accept this PR.
Just testing now and right off the bat, the groups are broken for every facade node, which renders them unbreakable.

I'm not gonna go through each of these changes to check for further issues.
These should have been thoroughly tested individually... to throw a PR at me this size and with so many various changes, is not something I'm going to even consider.

There could be numerous problems in all this mess, and tbh I do not have the time to go through it all one by one.

[h-v-smacker]

I'll look into what happens with groups (I tested on creative and on v4 back in October, which obviously could hide the issue you're seeing today), but otherwise most changes in the PR must be purely cosmetic. Indentation and such.

[TumeniNodes]

Just to make you aware, I have been getting ready to offer some of my mods (this one included) over to minetest_mods, because I have had less and less time, to fiddle these days.
Quite a few PRs and Issues came along which I did not even take notice of...
it doesn't help that it seems while MS is trying to push it's horrible changes to notifications, they are either intentionally making the old system it suck so people want the new one, or they are too busy and forgot about it.
So all I ever see is the last date I commented on just about everything (even with my acct set up to send notifications to my phone/email etc.)
And I opted out of the horror of the beta mess.

So anything being presented currently will have to remain on hold until I get these over there.
Then I will feel much better knowing people are not waiting around forever just to hear back, because i know that can get annoying and frustrating.

So I'm not leaving you or anyone else hanging.. I just need to get these things somewhere they can get better attention

Thank you

[Panquesito7]

Suggested change

	facade.in_creative_inventory (Facades show in inventory) bool true
	facade.in_creative_inventory (Enable facades in creative inventory) bool true

[Panquesito7]

Suggested change

	facade.protect_inventories (Facade shaper is protected) bool false
	facade.protect_inventories (Enable shaper protection) bool false