save all settings on first run and on mode change

js/options.js

@@ -33,6 +33,7 @@ function restore_options() {
     } else {
       mode = "light"
       browser.storage.sync.set({mode:"light"})
+      save_options()
     }
   })
   browser.storage.sync.get("links", function(result){
@@ -63,6 +64,7 @@ function change_mode() {
             input_colors[i].value = "#323234"
           }
         }
+        save_options()
         break
       case "dark":
         document.body.classList.remove('dark')
@@ -73,6 +75,7 @@ function change_mode() {
             input_colors[i].value = "#cfcfcf"
           }
         }
+        save_options()
         break
       default:
         break