fix(settings): Night mode settings and profile page UI improvements

Closes #16780
Closes #16781
Closes #16786

common/app/routes/Profile/profile.less

@@ -82,3 +82,13 @@
   }
 
 }
+
+.night {
+  .@{ns}-container {
+    .streak {
+      strong {
+        color: #ccc;
+      }
+    }
+  }
+}

common/app/routes/Settings/settings.less

@@ -13,6 +13,18 @@
       color: #333;
     }
   }
+  .panel {
+    color:#333333;
+    a {
+      color: @brand-primary;
+      &:hover, &:focus {
+        color: #001800;
+      }
+    }
+  }
+  .nav-tabs > li > a:hover {
+    color: #333333;
+  }
 }
 
 .@{ns}-container {
@@ -88,7 +100,7 @@
 
 .danger-zone-panel {
   background-color: #fff;
-
+  
   .panel-heading {
     background-color: #880000;
     color: #fff;