improve history graph

- JS optimized to avoid duplicate code
- Page redesigned with the help of the frameworks provides by AdminLTE
- Modification of the chart for a better presentation
- Headlines changed

front/css/dark-patch.css

@@ -674,9 +674,6 @@ input[type="password"]::-webkit-caps-lock-indicator {
    border-spacing: 0em;
    font-weight: 400;
    font-size: 15px;
-   width: 95%;
+   width: 100%;
    margin: auto;
-   margin-top: 40px;
-   margin-bottom: 40px;
-   border: solid 1px #606060;
 }