docs: add notices to modules that require font awesome 5

Description

Added notices to the docs to indicate modules that require font awesome 5

[x] I have added a tag to this pull request that indicates the impact of the change (patch, minor or major)
[x] My code follows the code style of this project.
[x] I have updated the documentation accordingly. (This includes updating the changelog).
[x] I have read the CONTRIBUTING document. (Last updated 16 Aug 2019)
[ ] All my changes are covered by tests.
[x] This request is ready to review and merge