Added acceptable ads list to the options UI

_locales/sl/messages.json

 {
+  "filters_addSubscriptionAdd_label": {
+    "message": "Dodaj"
+  }, 
   "filters_addSubscriptionOther_label": {
     "message": "Dodaj novo naročnino"
   }, 
   "filters_addSubscription_label": {
     "message": "Dodaj naročnino filtra"
   }, 
   "filters_subscription_lastDownload_checksumMismatch": {
     "message": "Neuspešno, kontrolna vsota se ne ujema"
   }, 
   "filters_subscription_lastDownload_connectionError": {
@@ skipping 10 matching lines @@
   }, 
   "global_remove_subscription_warning": {
     "message": "Želite res odpovedati naročnino?"
   }, 
   "global_subscription_invalid_location": {
     "message": "Mesto seznama filtrov ni niti veljaven URL niti veljavno ime datoteke."
   }, 
   "name": {
     "message": "Adblock Plus (Beta)"
   }, 
+  "overlay_hideplaceholders_label": {
+    "message": "Skrij ograde blokoranih elementov"
+  }, 
   "subscriptionSelection_location_label": {
     "message": "Mesto seznama filtriranja:"
   }, 
   "subscriptionSelection_subscriptionSelector_label": {
     "message": "Izberite naročnino na filter s seznama:"
   }, 
   "subscriptionSelection_title_label": {
     "message": "Naslov naročnine:"
   }
 }