Sync

Includes:
MAINT-3541 (crash in std::vector >::reserve)
MAINT-3364 FIXED Call clearSelection() from root_folder
MAINT-3621 FIXED Set name to "Unnamed" if object's name consists of whitespaces.
MAINT-3412 add gpu_table line with distinct Intel Iris Pro OpenGL regex to match new MBP with forced Intel graphics
MAINT-3119 FIXED Return common chars for triggers that matches the prefix.
MAINT-3661 Fix for crash when uploading corrupt .dae file.
MAINT-3671 FIXED Rename title when new tab is added.
MAINT-3465 FIXED Add check mark to selected entry.
BUG-5537 FIX reverting breaking changes to pectorals and belly.
MAINT-535 FIXED The teleport SLAPP is changed to UNTRUSTED_THROTTLE. Confirmation dialog for teleporting via slapp is added.

indra/newview/llviewermessage.cpp

@@ -3801,6 +3801,12 @@ void process_chat_from_simulator(LLMessageSystem *msg, void **user_data)
 	}
 	else
 	{
+		// make sure that we don't have an empty or all-whitespace name
+		LLStringUtil::trim(from_name);
+		if (from_name.empty())
+		{
+			from_name = LLTrans::getString("Unnamed");
+		}
 		chat.mFromName = from_name;
 	}