Fix for bug #137, provide a parent container for mw-content-text div. (+5 squashed commit)

Squashed commit:

[c81c65b] Adding icon to Atom toolbox choice on dropdown of recent changes/history pages.

[2dd38b8] Update CONTRIBUTING.md

update CONTRIBUTING.md with more information

[21ca9cc] Corrected changes to flow icon addition.

[6cb0580] Revert "Slight rework to keep classes flow the same."

This reverts commit 1ed3c67c2c63612e42ee00e6e99dce1514418919.

[1ed3c67] Slight rework to keep classes flow the same.
Merge branch 'feature/navbar-icon' of https://github.com/Hutchy68/foreground into feature/navbar-icon