build identifier: i20100313_1044

descriptions: 
i created a new parameter with a prompt text and help text containing unicode surrogate characters. when trying to preview, these unicode surrogate characters are garbled in the parameter input panel. 

expected: all characters are displayed correctly. 

reproducible: always

steps to reproduce:
1. create a report (ex. chart_date)
2. go to data explorer and right-click "report parameter"-> "new parameter" 
3. enter "u+3041u+2000b" (u+2000b is a unicode surrogate character) in the prompt text and the help text. (see: parameter1.jpg)
4. go to preview.
unicode surrogate character is garbled at the parameter input panel. (see: paramter2.jpg)
created an attachment (id=163235)
parameter1.jpg
created an attachment (id=163236)
parameter2.jpg
