Shopeditor: Further F1Menu Additions

[ZenBre4ker]

Building on the database module I ripped out the entire custom equipment editor syncing. Also added some more functionality to the database module. As well as added database functionality to our Panel elements.

[ZenBre4ker]

Yeah, couldnt stop earlier, this got larger than I thought.

Well..... additionally to above I did:

• Remove custom syncing in the database module, now done by a net.SendStream() as table with same structure
• Replaced custom syncing of the equipment table ttt2_items for the shop
• Added sql database access to panel elements
• Extended net.SendStream() so that it can handle more than 256kB at once, which somehow exceeded an internal net buffer
• Fixed some stuff too

I am pretty sure @saibotk isnt too happy about the extension. I see a lot of caches but dont really see how I can make less of them. Otherwise I hope you like the removal of lots of custom syncing code <3

[ZenBre4ker]

Okay, changes seem to work, the rest is still to be discussed.

[ZenBre4ker]

This now needs #1136 to fully work.

[ZenBre4ker]

Apparently this still depends on the rework #1135, which did some bugfixes as well. So making this a draft again 🙄

[ZenBre4ker]

Okay, this is finally ready for review again. Seems to work fine :)