Highlight wanted calls. Closes #117

templates/cards/wanted_calls.html

@@ -0,0 +1,18 @@
+<div class="card">
+    <div class="card-body">
+        <h5 class="card-title">Wanted Calls</h5>
+        <div class="card-text spothole-card-text">
+            <input type="text" class="storeable-text form-control" id="wantedCalls"
+                   oninput="saveSettings();" style="width: 14em; display: inline-block;">
+            <div class="mt-1">
+                <small>Enter a space- and/or comma-separated list of callsigns or partial callsigns. Any DX callsigns
+                    that
+                    match will be highlighted.</small>
+            </div>
+            <div class="mt-3">
+                <button type="button" class="btn btn-outline-secondary btn-sm" onclick="location.reload();">Reload
+                </button>
+            </div>
+        </div>
+    </div>
+</div>