Issue 370 - Right-clicked element is removed independent of created filter

_locales/lv/messages.json

 {
   "add": {
     "message": "Pievienot"
   },
   "add_domain_button": {
     "message": "Pievienot domēnu"
   },
   "add_filter_button": {
     "message": "Pievienot filtru"
   },
@@ skipping 75 matching lines @@
   },
   "out_of_date_lists": {
     "message": "Novecojušie saraksti tiek periodiski atjaunināti."
   },
   "remove_button": {
     "message": "Noņemt izvēlēto"
   },
   "show_block_element_menu": {
     "message": "Rādīt 'Bloķēt elementu''labā klikšķa izvēlnē"
   },
-  "show_icon": {
-    "message": "Rādīt ikonu adreses joslā"
-  },
   "stats_label_page": {
     "message": "<strong>$number$</strong> šajā lapā",
     "placeholders": {
       "number": {
         "content": "$1"
       }
     }
   },
   "stats_label_total": {
     "message": "<strong>$number$</strong> pavisam",
@@ skipping 20 matching lines @@
   "subscriptionSelection_subscriptionSelector_label": {
     "message": "Lūdzu, izvēlieties filtru abonementu no saraksta:"
   },
   "update_now": {
     "message": "Atjaunināt tagad"
   },
   "whitelisted_domains": {
     "message": "Domēni baltajā sarakstā"
   }
 }