Changed allowed zone difficulty to 15-30.

src/webview/index.html

@@ -128,7 +128,7 @@
                 </span>
             </div>
             <div class="control has-icons-left">
-                <input class="input" type="number" placeholder="Difficulty: 20-28" id="new_zone_difficulty" name="Just a name" oninput="onZoneChange()">
+                <input class="input" type="number" placeholder="Difficulty: 15-30" id="new_zone_difficulty" name="Just a name" oninput="onZoneChange()">
                 <span class="icon is-small is-left">
                     <i class="fas fa-fire"></i>
                 </span>

src/webview/scripts.js

@@ -206,7 +206,7 @@ function onZoneChange() {
     var diff = document.getElementById("new_zone_difficulty");
     d = parseInt(diff.value);
     // Checking for NaN first
-    if (d != d || d < 20 || d > 50) {
+    if (d != d || d < 15 || d > 30) {
         button.disabled = true;
         diff.className = "input is-danger";
     } else {
@@ -225,7 +225,7 @@ function zoneAvailable(available) {
         var diff = document.getElementById("new_zone_difficulty");
         d = parseInt(diff.value);
         // Checking for NaN first
-        if (d != d || d < 20 || d > 50) {
+        if (d != d || d < 15 || d > 30) {
             button.disabled = true;
             diff.className = "input is-danger";
         }