Both the title and the extract were being html escaped thus producing
string like ' and " when used with .text(). So, we now use
document.createTextNode() for the normal text and .text() with the bolded
one.
Bug: T93720
Change-Id: I6bbc52e427dc636b7b0be1ad4f749d9273ff61b3
Instead of replacing all instances of the title in the extract -
'$1<b>$2</b>$3'
We now put symbolic strings there which we use to split the string
and then make an array of text and <b> elements that get appended
to $contentbox.
Bug: T76378
Change-Id: I02222bbff84532f63cac67af1bf889c328ec6ff2
