lighten font color of search filter and set opacity of input placeholder

Author: mojavelinux

src/css/base.css

@@ -80,3 +80,7 @@ table {
   border-collapse: collapse;
   word-wrap: normal; /* table widths aren't computed as expected when word-wrap is enabled */
 }
+
+::placeholder {
+  opacity: 0.5;
+}

src/css/header.css

@@ -85,6 +85,7 @@ body {
   border: 1px solid var(--navbar-button-border-color);
   border-left: none;
   border-radius: 0 0.1em 0.1em 0;
+  color: var(--toolbar-font-color);
   cursor: pointer;
   font-size: 0.875em;
   display: flex;