refactor: increased the max value of dt for pid to 1800 sec

src_data/pages/settings.html

@@ -341,7 +341,7 @@
 
               <label for="pid-dt">
                 <span data-i18n>settings.pid.dt</span>
-                <input type="number" inputmode="numeric" id="pid-dt" name="pid[dt]" min="30" max="600" step="1" required>
+                <input type="number" inputmode="numeric" id="pid-dt" name="pid[dt]" min="30" max="1800" step="1" required>
               </label>
 
               <hr />