Typing '>' does not auto-close code hints for all tags

[redmunds]

Recipe:

1. open an HTML doc
2. place IP some place valid for an HTML tag
3. type '<div'
   >> verify code hints are showing
4. type '>'
   >> verify that code hints are dismissed
5. Undo all
6. type '<script'
   >> verify code hints are showing
7. type '>'

Result:
Code hints are not dismissed. Same for <style>. I suspect this is because these tags start a new CodeMirror "mode"

Expected:
Code hints are dismissed when tag is completed

[tvoliter]

assigned to @RaymondLim to look at HTMLUtils

[tvoliter]

FBNC @redmunds

[redmunds]

Confirmed fixed.