Let change message just be on the top of comments.

In the reply box let change cover message just be on the top
of the comments like that in 'History' list and email content.

Change-Id: Ifd8e718375d9140c9599b708ed586bf3e6ad473b
Replace 'indexOf()' expression with 'contains()'

Change-Id: I10a5ed7c813af7ab40707369bf4c1953c030b10d
Merge "Replace 'indexOf()' expression with 'contains()'"
Merge "Let change message just be on the top of comments."