Thanks for your response!
I am happy to see that you use a capital "S" to refer to Sentence case.
As I read in https://en.wiktionary.org/wiki/sentence_case
it means "the first letter uppercase and subsequent letter lowercase with exceptions such as proper nouns or acronyms". I am referring to the exception of proper nouns.
If e.g. I create a new type of block and I name it "Exceptional New Grades" how should the following message refer to it?
Add a new "Exceptional New Grades" block.
Add a new Exceptional New Grades block.
Add a new Exceptional new grades block.
Add a new exceptional new grades block.
In other words, why is "The Activity results..." using a capital "A"? And why is "Add a new activity..." using a small "a"?
(from the forum's description)