Fix appearance of filter extensions twice in filepicker. Bug 115670,

r=bryner, sr=jag.

suite/locales/en-US/chrome/common/contentAreaCommands.properties

@@ -7,8 +7,8 @@ searchText=Search %S for "%S"
 SavePageTitle=Save Web Page
 SaveImageTitle=Save Picture
 SaveLinkTitle=Save As
-WebPageCompleteFilter=Web Page, complete (*.htm;*.html)
-WebPageHTMLOnlyFilter=Web Page, HTML only (*.htm;*.html)
-TextOnlyFilter=Text File (*.txt)
-AllFilesFilter=All Files (*.*)
+WebPageCompleteFilter=Web Page, complete
+WebPageHTMLOnlyFilter=Web Page, HTML only
+TextOnlyFilter=Text File
+AllFilesFilter=All Files