Previously, absent a specified target attribute, when clicking on an anchor tag with an href beginning
with either "javascript:" or "mailto:", the framework would rewrite the URL, when it ought not to.
With this change, the browser is prevented from rewriting if the URL begins with a case-insensitive match
for "javascript:" or "mailto:", optionally preceeded by whitespace.
Closes#8407Closes#8425Closes#8426
winsontam
c3fad1157e