Few more changes (#217)

RX_FSK/data/style.css

@@ -339,7 +339,7 @@ p{
 @media (prefers-color-scheme: dark) {
   body {
     background-color: #333;
-      }   
+  }   
   h2{
     color: white;
   }
@@ -354,12 +354,20 @@ p{
     background-color: #333;
   }
   a:link, a:visited {
-    color: grey !important;
+    color: #D3D3D3;
   }
-  .topnav {
+  .topnav, td#sfreq {
     background-color: grey;
   }
   .topnav a:visited {
-    color: white !important;
+    color: white;
+  }
+  .ctlbtn {
+    color: white;
+    background-color: grey;
+  }
+  .leaflet-center {
+    color: white;
+    background-color: grey;
   }
 }