Sister says imprisoned U.S-Egyptian just an "idealistic guy"

* Salah and Mohamed Soltan sentenced on Saturday * White House has condemned decision against son, a U.S. citizen * Sister says Mohamed not Brotherhood, helped foreign journalists By Sylvia Westall CAIRO, April 16 (Reuters) - From her home in Washington DC, Hanaa Soltan said she felt an overwhelming sense of grief when an Egyptian court condemned her father to death and her U.S-Egyptian brother to life in jail for involvement in the outlawed Muslim Brotherhood. Salah and Mohamed Soltan, sentence