mailreport - Fix spelling, email header and table header

* Spelling now sticks with [RFC Style Guide](https://www.rfc-editor.org/rfc-style-guide/terms-online.txt) (email, Email at the beginning of a sentence)
* Email header now "Email Report" instead of "Graph Report"
* Table header now "Commands" instead of "Cmds" (plus fix for width)
* Version increased to 2.0.10