[Commands] Cleanup #hideme Command (#3043)

# Notes
- Cleanup messages and logic.

zone/gm_commands/hideme.cpp

@@ -1,16 +1,31 @@
 #include "../client.h"
-#include "../string_ids.h"
 
 void command_hideme(Client *c, const Seperator *sep)
 {
-	bool state = atobool(sep->arg[1]);
+	const auto arguments = sep->argnum;
+	if (!arguments) {
+		c->Message(Chat::White, "Usage: #hideme [On|Off]");
+		c->Message(Chat::White, "Usage: #hideme [0|1]");
+		return;
+	}
 
-	if (sep->arg[1][0] == 0) {
-		c->Message(Chat::White, "Usage: #hideme [on/off]");
-	}
-	else {
-		c->SetHideMe(state);
-		c->MessageString(Chat::Broadcasts, c->GetHideMe() ? NOW_INVISIBLE : NOW_VISIBLE, c->GetName());
+	auto t = c;
+	if (c->GetGM() && c->GetTarget() && c->GetTarget()->IsClient()) {
+		t = c->GetTarget()->CastToClient();
 	}
+
+	const auto is_hidden = Strings::ToBool(sep->arg[1]);
+
+	t->SetHideMe(is_hidden);
+
+	c->Message(
+		Chat::White,
+		fmt::format(
+			"{} {} now {} to players below a status level of {}.",
+			c->GetTargetDescription(t, TargetDescriptionType::UCYou),
+			c == t ? "are" : "is",
+			is_hidden ? "invisible" : "visible",
+			t->Admin()
+		).c_str()
+	);
 }
-