Feature: allow to do a hostile takeover of an AI company (in singleplayer) (#10914)

With the removal of the share-system, you could no longer make an
AI disappear in a single player game. At least, not without going
into the console.

src/company_cmd.cpp

@@ -709,7 +709,7 @@ static void HandleBankruptcyTakeover(Company *c)
 
 	AI::NewEvent(best->index, new ScriptEventCompanyAskMerger(c->index, c->bankrupt_value));
 	if (IsInteractiveCompany(best->index)) {
-		ShowBuyCompanyDialog(c->index);
+		ShowBuyCompanyDialog(c->index, false);
 	}
 }