Fix iocaine button when adding new task

app/styles/modules/common/lightbox.scss

@@ -57,10 +57,14 @@
         }
         .requirement,
         .iocaine {
+            vertical-align: middle;
             &:hover {
                 background: $primary-light;
                 border: 1px solid $primary;
             }
+            svg {
+                @include svg-size(.75rem);
+            }
         }
 
         .blocked {

app/themes/taiga/custom.scss

@@ -61,11 +61,11 @@ input[type="date"],
 input[type="password"],
 select,
 textarea {
-    background: $whitish;
+    background: lighten($whitish, 6%);
     border-color: $gray-light;
     color: $grayer;
     @include placeholder {
-        color: darken($gray-light, 10%);
+        color: lighten($gray-light, 10%);
     }
     &.checksley-error {
         border: 1px solid $red;