EXT-5560 - filter clear button was calling doDelete which had many more...

EXT-5560 - filter clear button was calling doDelete which had many more gyrations than onCommit, and only onCommit was needed

indra/llui/llsearcheditor.cpp

@@ -156,7 +156,7 @@ void LLSearchEditor::setFocus( BOOL b )
 void LLSearchEditor::onClearButtonClick(const LLSD& data)
 {
 	setText(LLStringUtil::null);
-	mSearchEditor->doDelete(); // force keystroke callback
+	mSearchEditor->onCommit(); // force keystroke callback
 }
 
 void LLSearchEditor::handleKeystroke()