fixup! Add TorStrings module for localization

toolkit/torbutton/chrome/locale/en-US/torbutton.dtd

@@ -8,6 +8,8 @@
 <!ENTITY torbutton.context_menu.new_circuit_key "C">
 
 <!ENTITY torbutton.circuit_display.title "Tor Circuit">
+<!-- Old circuit display strings used up to 12.0 - remove when 12.5 becomes
+   - stable. -->
 <!ENTITY torbutton.circuit_display.new_circuit "New Circuit for this Site">
 
 <!-- Onion services strings. Strings are kept here for ease of translation. -->

toolkit/torbutton/chrome/locale/en-US/torbutton.properties

@@ -18,7 +18,7 @@ torbutton.circuit_display.tor_bridge = Bridge
 # LOCALIZATION NOTE: Used when a circuit node's regional location is unknown.
 torbutton.circuit_display.unknown_region = Unknown region
 # LOCALIZATION NOTE: %S will be the localized region name for the guard node.
-torbutton.circuit_display.region-guard-node = %S (Guard)
+torbutton.circuit_display.region-guard-node = %S (guard)
 torbutton.circuit_display.new-circuit-guard-description = Your guard node may not change
 torbutton.circuit_display.new-circuit-bridge-description = Your bridge may not change