GuiInterface-notifications are not translated

[elexis]

There are many local chat notifications which are not translated, for example:

cmpGuiInterface.PushNotification({ "type": "chat", "players": [input.player], "message": "This building only has " + techs.length + " technologies." });

A correct example would be:

	cmpGUIInterface.PushNotification({
		"players": [1,2,3,4,5,6,7,8], 
		"message": markForTranslation("The first wave will start in 15 minutes!"),
		"translateMessage": true
	});

See also wiki:Internationalization#InternationalizingJavaScriptSimulationFiles

[leper]

In 17614:

Translate some notification messages. Refs #3665.

[leper]

All remaining untranslated notifications are in Cheat.js and Commands.js. I'm not sure if we should keep the notifications in the former (some do not really add anything IMO). For the ones in Commands.js it would be nice to only push one notification in some of the commands instead of multiple. We should also (for notifyUnloadFailure and notifyBackToWorkFailure) improve the message and use proper plural forms where needed.

[elexis]

In 17796:

Translate some untranslated strings, refs #3665.
Add a chat message if the control-all units cheat was used, refs #2676.

[elexis]

For pluralforms, translateObjectKeys will need plural-translation support :-/

[elexis]

Another problematic GUI interface notification translation can be found in SubtractResourcesOrNotify of Player.js that hardcodes a string for 4 different resource types, while it should use getLocalizedResourceAmounts (as of r19757).