fix decimal places for temperature value

(issue #1251)

src/web/html/visualization.html

@@ -108,7 +108,6 @@
                     if(0 != obj.max_pwr)
                         pwrLimit += ", " + Math.round(obj.max_pwr * obj.power_limit_read / 100) + "W";
                 }
-
                 return ml("div", {class: "row mt-2"},
                     ml("div", {class: "col"}, [
                         ml("div", {class: "p-2 " + clh},
@@ -123,7 +122,7 @@
                                 ml("div", {class: "col a-c"}, ml("span", { class: "pointer", onclick: function() {
                                     getAjax("/api/inverter/alarm/" + obj.id, parseIvAlarm);
                                 }}, ("Alarms: " + obj.alarm_cnt))),
-                                ml("div", {class: "col a-r mx-2 mx-md-1"}, String(obj.ch[0][5]) + t.innerText)
+                                ml("div", {class: "col a-r mx-2 mx-md-1"}, String(obj.ch[0][5].toFixed(1)) + t.innerText)
                             ])
                         ),
                         ml("div", {class: "p-2 " + clbg}, [