Ion laws (including the "random" ones by admins) are now more visible for the AI/robots.

Because single line of text is so easy to miss in spammed chat. Now it automatically shows output of show-laws verb which is significantly harder to miss.
Merge pull request #7482 from atlantiscze/laws-updated

Ion Law Visibility
fixes #7487

also fixes lag when building APCs in space.

Signed-off-by: Mloc-Argent <colmohici@gmail.com>
Merge pull request #7499 from Mloc/bs12-spaceisnotproper

fixes #7487
Slime Fix
- Adds missing slime sprites, eliminating the infamous invisible slime bug.
- Added sprites are taken from tgstation's code, and correspond with wiki entry.
Merge pull request #7514 from atlantiscze/slime-fix

Slime Fix
Fixes being able to put lit welders in backpacks
Merge pull request #7521 from mwerezak/master

Fixes being able to put lit welders in backpacks