Fix deceptive "successfully saved" messages for mappers (#5714)

* Actually check if map save succeeded before displaying success message

It would be great to offer more clarity to the mapper about *why* the
save didn't succeed, but at least they won't be deceived into thinking
their work has been saved when it hasn't.

Portuguese localization text is via DuckDuckGo Translate, so I hope it's
reasonable.

* Actually check save success for saving grids

These messages need localization, too, but that seems out of scope for
my PR.

* Improve map save error message

Now it tells the mapper to go look at the server log.
Still translated via DuckDuckGo Translate.

* Normalize indentation and style

Resources/Locale/en-US/commands.ftl

@@ -156,6 +156,7 @@ cmd-savemap-not-exist = Target map does not exist.
 cmd-savemap-init-warning = Attempted to save a post-init map without forcing the save.
 cmd-savemap-attempt = Attempting to save map {$mapId} to {$path}.
 cmd-savemap-success = Map successfully saved.
+cmd-savemap-error = Could not save map! See server log for details.
 cmd-hint-savemap-id = <MapID>
 cmd-hint-savemap-path = <Path>
 cmd-hint-savemap-force = [bool]

Resources/Locale/pt-BR/commands.ftl

@@ -136,6 +136,7 @@ cmd-savemap-not-exist = O mapa de destino não existe.
 cmd-savemap-init-warning = Tentativa de salvar um mapa pós-inicialização sem forçar o salvamento.
 cmd-savemap-attempt = Tentando salvar o mapa {$mapId} em {$path}.
 cmd-savemap-success = Mapa salvo com sucesso.
+cmd-savemap-error = Não foi possível salvar o mapa! Consulte o log do servidor para obter detalhes.
 cmd-hint-savemap-id = <MapID>
 cmd-hint-savemap-path = <Path>
 cmd-hint-savemap-force = [bool]