Merge pull request #856 from rjd22/darken-inputs-in-dark-mode

Make input borders in dark mode a darker

src/scss/_dark.scss

@@ -47,6 +47,7 @@
   .form-imagecheck-figure:before {
     background-color: $dark-mode-darken;
     color: $dark-mode-text;
+    border-color: $dark-mode-lighten-10;
   }
 
   .form-control-plaintext {

src/scss/_variables.scss

@@ -185,6 +185,7 @@ $colors: (
 // Dark mode
 $dark-mode-darken: darken($dark, 2%) !default;
 $dark-mode-lighten: lighten($dark, 2%) !default;
+$dark-mode-lighten-10: lighten($dark, 10%) !default;
 $dark-mode-text: $light;
 
 // Borders