add ability to override frequency per plant and adjust timezone, fix missing workhour for plants

rust/src_webpack/src/timeview.ts

@@ -8,9 +8,14 @@ export class TimeView {
     auto_refresh: HTMLInputElement;
   controller: Controller;
   timer: NodeJS.Timeout | undefined;
+  timezoneSelect: HTMLSelectElement;
   
     constructor(controller:Controller) {
       (document.getElementById("timeview") as HTMLElement).innerHTML = require("./timeview.html")
+      this.timezoneSelect = document.getElementById('timezone_select') as HTMLSelectElement;
+      this.timezoneSelect.onchange = function(){
+        controller.configChanged()
+      }
 
       this.auto_refresh = document.getElementById("timeview_auto_refresh") as HTMLInputElement;
       this.esp_time = document.getElementById("timeview_esp_time") as HTMLDivElement;
@@ -44,4 +49,26 @@ export class TimeView {
       }
       
     }
-  }
+
+    timezones(timezones: string[]) {
+      timezones.forEach(tz => {
+        const option = document.createElement('option');
+        option.value = tz;
+        option.textContent = tz;
+        this.timezoneSelect.appendChild(option);
+      });
+
+    }
+
+  getTimeZone() {
+    return this.timezoneSelect.value;
+  }
+
+  setTimeZone(timezone: string | undefined) {
+    if (timezone != undefined) {
+      this.timezoneSelect.value = timezone;
+    } else {
+      this.timezoneSelect.value = "UTC";
+    }
+  }
+}