Workaround for EXT-4725(Viewer crashes if try to call from 'Nearby voice' floater).

- Enabling/disabling 'Call'menu item is moved to createMenu(). Some way to properly enable/disable it in
 enableContextMenuItem() should be found.

--HG--
branch : product-engine

indra/newview/llparticipantlist.cpp

@@ -433,6 +433,12 @@ LLContextMenu* LLParticipantList::LLParticipantListMenu::createMenu()
 	LLContextMenu* main_menu = LLUICtrlFactory::getInstance()->createFromFile<LLContextMenu>(
 		"menu_participant_list.xml", LLMenuGL::sMenuContainer, LLViewerMenuHolderGL::child_registry_t::instance());
 
+	// AD *TODO: This is workaround for EXT-4725- way to properly enable/disable "Call" menu item in
+	// enableContextMenuItem() should be found.
+	bool not_agent = mUUIDs.front() != gAgentID;
+	bool can_call = not_agent && LLVoiceClient::voiceEnabled() && gVoiceClient->voiceWorking();
+	main_menu->setItemEnabled("Call", can_call);
+
 	// Don't show sort options for P2P chat
 	bool is_sort_visible = (mParent.mAvatarList && mParent.mAvatarList->size() > 1);
 	main_menu->setItemVisible("SortByName", is_sort_visible);

indra/newview/skins/default/xui/en/menu_participant_list.xml

@@ -57,9 +57,6 @@
      name="Call">
          <menu_item_call.on_click
          function="Avatar.Call" />
-        <menu_item_call.on_enable
-         function="ParticipantList.EnableItem"
-         parameter="can_call" />
     </menu_item_call>
     <menu_item_call
      enabled="true"