change hl text color to the default text color in non-dark schema. looks good, except in dark, where i can change it in dark.css.

(cherry picked from commit b97143e9db)

view/theme/redbasic/css/style.css

@@ -1807,5 +1807,5 @@ dl.bb-dl > dd > li {
 /* default highlighted text if not specified by schema: */
 span.default-highlight {
     background-color: yellow;
-    color: #111;
+    color: #4d4d4d;
 }