Graph de famille en frontend (#820)

* Remove graphviz and use cytoscape.js instead

* Frontend generated graphs
* Make installation easier and faster
* Better user experience
* Family api and improved interface
* Fix url history when using 0, improve button selection and reset reverse with reset button
* Use klay layout
* Add js translations and apply review comments

core/static/core/js/script.js

@@ -89,7 +89,7 @@ function update_query_string(key, value, action = History.REPLACE, url = null) {
     if (!url){
         url = new URL(window.location.href);
     }
-    if (!value) {
+    if (value === undefined || value === null || value === "") {
         // If the value is null, undefined or empty => delete it
         url.searchParams.delete(key)
     } else if (Array.isArray(value)) {

core/static/core/style.scss

@@ -239,6 +239,7 @@ a:not(.button) {
     padding: 9px 13px;
     border: none;
     text-decoration: none;
+    border-radius: 5px;
 
     &.btn-blue {
       background-color: $deepblue;