2436: remove  HtmlToolTip and HtmlLabel

temporary remove HtmlToolTip and HtmlLabel,
just for debugging,
we will bring them back again!
2438
2439: refactor
2241: basic mouse event
2445: Build Dom and Attach Event!
2446
2447: refactor
2448: refactor

we will add these (removed) features back
2449: Demo2

another Dom building style : lambda and adhoc code
6888: refactor

step up revision number to 6886
because of merging with another ( internal built)
revision
6893: force dynamic dom update
6894: update demo list
Merge branch 'v1.7dev' into v1.7