- Use existing translation of "Back".

Thanks to xet7 !

client/components/rules/ruleDetails.jade

@@ -17,6 +17,4 @@ template(name="ruleDetails")
     div.rules-back
         button.js-goback
           i.fa.fa-chevron-left
-          | {{{_ 'r-back'}}}
-    
-    
+          | {{{_ 'back'}}}

client/components/rules/rulesActions.jade

@@ -26,4 +26,4 @@ template(name="rulesActions")
   div.rules-back
         button.js-goback
           i.fa.fa-chevron-left
-          | {{{_ 'r-back'}}}
+          | {{{_ 'back'}}}

client/components/rules/rulesTriggers.jade

@@ -22,4 +22,4 @@ template(name="rulesTriggers")
   div.rules-back
         button.js-goback
           i.fa.fa-chevron-left
-          | {{{_ 'r-back'}}}
+          | {{{_ 'back'}}}

i18n/en.i18n.json

@@ -608,10 +608,9 @@
     "r-d-add-checklist": "Add checklist",
     "r-d-remove-checklist": "Remove checklist",
     "r-when-a-card-is-moved": "When a card is moved to another list",
-    "r-back": "Back",
-    "ldap": "Ldap",
-    "oauth2": "Oauth2",
-    "cas": "Cas",
+    "ldap": "LDAP",
+    "oauth2": "OAuth2",
+    "cas": "CAS",
     "authentication-method": "Authentication method",
     "authentication-type": "Authentication type"
 }