SL-14572 Fixed two cases of viewer using wrong names for muting

indra/newview/llinspectavatar.cpp

@@ -348,7 +348,7 @@ void LLInspectAvatar::onClickMuteVolume()
 	LLMuteList* mute_list = LLMuteList::getInstance();
 	bool is_muted = mute_list->isMuted(mAvatarID, LLMute::flagVoiceChat);
 
-	LLMute mute(mAvatarID, mAvatarName.getDisplayName(), LLMute::AGENT);
+	LLMute mute(mAvatarID, mAvatarName.getUserName(), LLMute::AGENT);
 	if (!is_muted)
 	{
 		mute_list->add(mute, LLMute::flagVoiceChat);

indra/newview/llpanelblockedlist.cpp

@@ -232,7 +232,7 @@ void LLPanelBlockedList::onFilterEdit(const std::string& search_string)
 void LLPanelBlockedList::callbackBlockPicked(const uuid_vec_t& ids, const std::vector<LLAvatarName> names)
 {
 	if (names.empty() || ids.empty()) return;
-	LLMute mute(ids[0], names[0].getAccountName(), LLMute::AGENT);
+    LLMute mute(ids[0], names[0].getUserName(), LLMute::AGENT);
 	LLMuteList::getInstance()->add(mute);
 	showPanelAndSelect(mute.mID);
 }