Fix Firefox mobile unneeded resize

Before that, on Firefox Mobile, when you were moving to the top or to
the bottom of the page, you were stopped before to go to the opposite
side.

app/Resources/static/themes/_global/index.js

@@ -65,7 +65,7 @@ $(document).ready(() => {
     retrievePercent(x.entryId);
 
     $(window).resize(() => {
-      retrievePercent(x.entryId);
+      retrievePercent(x.entryId, true);
     });
   }
 });

app/Resources/static/themes/_global/js/tools.js

@@ -19,14 +19,16 @@ function savePercent(id, percent) {
   return true;
 }
 
-function retrievePercent(id) {
+function retrievePercent(id, resized) {
   if (!supportsLocalStorage()) { return false; }
 
   const bheight = $(document).height();
   const percent = localStorage[`wallabag.article.${id}.percent`];
   const scroll = bheight * percent;
 
+  if (!resized) {
     $('html,body').animate({ scrollTop: scroll }, 'fast');
+  }
 
   return true;
 }