Remove inherited language strings from en_GB and en_ZA
Capitalize some language keys (yes, no and AD modes)
Revert "Capitalize some language keys (yes, no and AD modes)"

This reverts commit 9c2582a26e37fb09642a4e925976681386aad09d.
Language file changes:
Add missing tooltips! (Chemical oxidizer and infuser), please check!
Change "Round robin" to "Round-robin"
Make tooltips more 'square'