add missing translation

fittrackee_client/src/components/Activity/ActivityDisplay/index.jsx

@@ -155,7 +155,9 @@ class ActivityDisplay extends React.Component {
                         <div className="card-body">
                           <div className="row">
                             <div className="col">
-                              <div className="chart-title">Chart</div>
+                              <div className="chart-title">
+                                {t('activities:Chart')}
+                              </div>
                               <ActivityCharts
                                 activity={activity}
                                 dataType={dataType}

fittrackee_client/src/locales/en/activities.json

@@ -5,6 +5,7 @@
   "Ave. speed": "Ave. speed",
   "Ascent": "Ascent",
   "Average speed": "Average speed",
+  "Chart": "Chart",
   "Confirmation": "Confirmation",
   "data from gpx, without any cleaning": "data from gpx, without any cleaning",
   "Date": "Date",

fittrackee_client/src/locales/fr/activities.json

@@ -5,6 +5,7 @@
   "Ave. speed": "Vitesse moyenne",
   "Ascent": "Dénivelé positif",
   "Average speed": "Vitesse moyenne",
+  "Chart": "Analyse",
   "Confirmation": "Confirmation",
   "data from gpx, without any cleaning": "données issues du fichier gpx, sans correction",
   "Date": "Date",