Remove clip-path (#2025)

Revert #1920 to fix #2021.

Author: ffoodd

src/css/main.css

@@ -130,7 +130,6 @@ textarea {
 .visuallyhidden {
     border: 0;
     clip: rect(0 0 0 0);
-    clip-path: inset(50%);
     height: 1px;
     margin: -1px;
     overflow: hidden;
@@ -149,7 +148,6 @@ textarea {
 .visuallyhidden.focusable:active,
 .visuallyhidden.focusable:focus {
     clip: auto;
-    clip-path: none;
     height: auto;
     margin: 0;
     overflow: visible;