refactor: updated functional icon fonts (#229)

* refactor: updated icon fonts

* refactor: updated icon fonts

* feat: added 16pt icons

* refactor: updated functional icons to v2.20.0

* feat: added new icons

* refactor: added new icons

* refactor: updated icon fonts

* refactor: renamed due to technical reasons

* feat: added new icons

* chore: simple reformatting

* feat: added new icons

* refactor: renamed shower_man to shower_men

to align with the other filenames

* refactor: renamed for differentiation

* feat: moved those icons to another category

* chore: simple reformatting

* refactor: further font updates

Author: mfranzke