Add option to reposition the expand thread button (CC)

This option repositions the expand thread button all the way to the left
of the thread element in thread lists (Community Console). Originally,
this button is shown in the right.

Requested at pekb/thread/67965396?msgid=91547227.

Change-Id: I10cd62998f6165ec58705fd912089119a7e0a108
diff --git a/src/_locales/ca/messages.json b/src/_locales/ca/messages.json
index 746ac61..c4c74cc 100644
--- a/src/_locales/ca/messages.json
+++ b/src/_locales/ca/messages.json
@@ -95,6 +95,10 @@
     "message": "Mostra el punt que notifica que hi ha anuncis sense llegir d'una manera més prominent a la Consola de la Comunitat.",
     "description": "Feature checkbox in the options page"
   },
+  "options_repositionexpandthread": {
+    "message": "Posa el botó \"expandir fil\" a l'esquerra del tot en les llistes de fils de la Consola de la Comunitat.",
+    "description": "Feature checkbox in the options page"
+  },
   "options_profileindicator_header": {
     "message": "Punt indicador",
     "description": "Heading for the profile indicator feature options"
diff --git a/src/_locales/en/messages.json b/src/_locales/en/messages.json
index 407ba5c..f3b71d3 100644
--- a/src/_locales/en/messages.json
+++ b/src/_locales/en/messages.json
@@ -99,6 +99,10 @@
     "message": "Show the announcements notification dot more prominently in the Community Console.",
     "description": "Feature checkbox in the options page"
   },
+  "options_repositionexpandthread": {
+    "message": "Place the \"expand thread\" button all the way to the left in the Community Console thread lists.",
+    "description": "Feature checkbox in the options page"
+  },
   "options_profileindicator_header": {
     "message": "Indicator dot",
     "description": "Heading for the profile indicator feature options"
diff --git a/src/_locales/es/messages.json b/src/_locales/es/messages.json
index 96b6fd9..1ac1f11 100644
--- a/src/_locales/es/messages.json
+++ b/src/_locales/es/messages.json
@@ -95,6 +95,10 @@
     "message": "Muestra el punto que notifica que hay anuncios sin leer de manera más prominente en la Consola de la Comunidad.",
     "description": "Feature checkbox in the options page"
   },
+  "options_repositionexpandthread": {
+    "message": "Pon el botón \"expandir hilo\" a la izquierda del todo en las listas de hilos de la Consola de la Comunidad.",
+    "description": "Feature checkbox in the options page"
+  },
   "options_profileindicator_header": {
     "message": "Punto indicador",
     "description": "Heading for the profile indicator feature options"