NEW MOD: Retail Shoppers Keep Their Bought Stuff (Patreon)

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UPDATED for patch 1.77.131.1020
You need to update my main mod since this latest patch!
When updating this mod I changed it so that it will only be 1 file instead of two to choose from, so make sure that you remove the old mod before adding this new file, to make sure you wont get duplicaded files because of name change.
(The RingUpAtRegister compatibility patch is not yet updated, that depends on if the modder needs to update their mod as well, then I will update this patch when they are done updateing their mod)
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This is my first shared mod! And my first Patreon post. I hope you all are having a good day! 
I dont have any good screenshots at the moment, also there might be some typos or bad grammar here and there in this post, sorry about both of these things.

Background:
When watching a video after by another simmer, I realized more Simmers than me was annoyed that Sims buying stuff in your store, wont actually keep the stuff they buy in the store when your active sim is the store owner. And she almost begged for help with this by any modder. And after a while modding other things to learn I felt confident enough to try this out myself, and it resulted in this small mod.

What it does:
It makes i so that the NPC´s and not currently active sim´s that visits your shop and buy things will have kept the thing they baught when playing with that sim. This was working both for sims marked as played and also unplayed random townies, both with or without homes at the moment of buying things. 
The bought items will show up in the sim´s personal inventory if it is an item that is allowed in there, if not it will be added to the houshold inventory (like a bed or something that dont go in the personal inventory).  

So important things to know:
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1)
I previously had two versionsof my mod, one for Snowy escape and one for not owning that pack, while understanding more about patches and modding now I realize there are no need for more than one file. So I have added only one that will work in both cases. (There are still 2 versions of the compatibility patch to the RingUpAtRegister-mod, but that might change later as well, I have reached out to the modder to see if their mod needs update or not, if it will be updated then I will update this patch as well.)
2)
Currently this mod will conflict with other mods that make changes in the following file: 
- Interaction Tuning "retail_BuyItem"
(I might being able to fix this if I learn how to script, or maybe not. But this is how it is today anyway.)

3) 
Only use ONE of these mods, not both at the same time.

4)
 This mod REQUIRES: Get To Work - Expansion Pack.

5)
- This mod is only meant to fix the issue on the things that are marked as on sale in the store.
- I have not being able to confirm if this also works for the food bought in retail fridges. If someone finds out if this mod works or not in this case, please let me know. 
- This mod does not change anything on how the mannequins work
- This mod does not change anything related to how any other selling stuff in the game works, such as Plopsy, portable selling tables or selling on fleemarket.

Found Issues:
- I have noticed that if you are customer in another sims shop, the other sims buying stuff from that store, still wont keep their bought stuff, and even that particular situation feels a bit buggy in itself, I think I will try to see if I can figure out a way to make this work in the future.

Mod Compatibility:
I got to know of a mod conflict with the new mod "Ring Up Customers at Register" by cLineLy over at ModTheSims, and have created a patch/addon to enable our mods to work together. 
If you don´t know about this mod, this is the link to it, looks really nice: https://modthesims.info/d/649661/ring-up-customers-at-register.html
I also want to say thank you to cLineLy for answering my question about publishing this patch so fast, and that they didn´t have any problems with it.
To use this patch you need to use both their and my mods as usual, but also add the patch  inside the Overrides-folder. Use only one of theses patches, if you have Snowy Escape use that version.  Only use the patch if you use both their and my mod together.
If you are not familiar with how the Overrides-folder works or how to make it work, Zero have talked about it a littele bit in a tutorial, they have also a download with the folder and a modified resource file. Read about it here: https://www.patreon.com/posts/tutorial-patch-33956639

File Description:
Original Mod:
SweetLilja_RetailShoppersKeepTheirBoughtStuff.package
Compatibility Patch:
SweetLilja_RetailShoppersKeepTheirBoughtStuff_RingUpAtRegister_CompatibilityPatch.package
Compatibility Patch - Snowy Escape version:
SweetLilja_RetailShoppersKeepTheirBoughtStuff_RingUpAtRegister_CompatibilityPatch_SnowyEscape.package

Patch compatibility
- verified with patch: 1.69.59.1020
- verified with patch: 1.70.84
- verified with patch: 1-71-86
- verified with patch: 1.75.125
- verified with patch: 1.76.81.1020
- updated for patch: 1.77.131.1020


Communication:
I added a link to this mod on Tumblr. I will try that as a place if someone have a question about my mods, and see if that works well. If not, I will think about something else. It felt a bit stupid one could not edit a post, so don't know if I like it.