Replace "world coordinate system" with "global ..

[stefancyliax]

During review the project group noticed, that the term "world coordinate system" is used in the glossary and at a few places in the documentation. Since there is no real difference between "world ..." and "global coordinate system", only the later term shall be used.

OSI CCB 15.09.2021:

• Is the term world coordinate system used somewhere? In OSI there is no difference between "global.." and "world..". "World Coordinate System" shall not be used in the documentation. -> Will create Ticket for this.

Originally posted by @stefancyliax in #40 (comment)