Refactor translation files

- Add prefixes to all message keys to provide context
- Use messages with attributes for some UI elements (dropdowns, dialogs, checkboxes, menus)
- Rename some class fields for consistency with translation keys

mods/ts/rules/world.yaml

@@ -307,12 +307,12 @@ World:
 	CreateMapPlayers:
 	StartingUnits@MCV:
 		Class: none
-		ClassName: mcv-only
+		ClassName: options-starting-units.mcv-only
 		Factions: gdi, nod
 		BaseActor: mcv
 	StartingUnits@light.gdi:
 		Class: light
-		ClassName: light
+		ClassName: options-starting-units.light
 		Factions: gdi
 		BaseActor: mcv
 		SupportActors: e1,e1,e1,smech
@@ -320,7 +320,7 @@ World:
 		OuterSupportRadius: 5
 	StartingUnits@light.nod:
 		Class: light
-		ClassName: light
+		ClassName: options-starting-units.light
 		Factions: nod
 		BaseActor: mcv
 		SupportActors: e1,e1,e1,bggy
@@ -328,7 +328,7 @@ World:
 		OuterSupportRadius: 5
 	StartingUnits@med.gdi:
 		Class: medium
-		ClassName: medium
+		ClassName: options-starting-units.medium
 		Factions: gdi
 		BaseActor: mcv
 		SupportActors: e1,e1,e2,e2,jumpjet,smech
@@ -336,7 +336,7 @@ World:
 		OuterSupportRadius: 5
 	StartingUnits@med.nod:
 		Class: medium
-		ClassName: medium
+		ClassName: options-starting-units.medium
 		Factions: nod
 		BaseActor: mcv
 		SupportActors: e1,e1,e3,e3,cyborg,bggy
@@ -344,7 +344,7 @@ World:
 		OuterSupportRadius: 5
 	StartingUnits@heavy.gdi:
 		Class: heavy
-		ClassName: heavy
+		ClassName: options-starting-units.heavy
 		Factions: gdi
 		BaseActor: mcv
 		SupportActors: e1,e1,e2,e2,jumpjet,smech,smech,mmch
@@ -352,7 +352,7 @@ World:
 		OuterSupportRadius: 5
 	StartingUnits@heavy.nod:
 		Class: heavy
-		ClassName: heavy
+		ClassName: options-starting-units.heavy
 		Factions: nod
 		BaseActor: mcv
 		SupportActors: e1,e1,e3,e3,cyborg,bggy,bike,ttnk