Lower the specificity of vertical-align of SVG

scss/_reboot.scss

@@ -272,9 +272,14 @@ img {
   border-style: none; // Remove the border on images inside links in IE 10-.
 }
 
-svg:not(:root) {
-  overflow: hidden; // Hide the overflow in IE
+svg {
   vertical-align: middle;
+
+  &:not(:root) {
+    // Workaround for the SVG overflow bug in IE10/11 is still required.
+    // See https://github.com/twbs/bootstrap/issues/26878
+    overflow: hidden;
+  }
 }