Fix extra dom update causing event removal issue

[mpourismaiel]

What this PR does / why we need it: This PR fixes jq-helpers append function that caused an update on all the nodes inside the context element, creating an update to the dom which in turn removed all the events and updates made to the element inside that context.

This also fixes scroll to top issue (unrelated to the main fix but it was a really small change, done in a separate commit).

Which issue this PR fixes: fixes #679

Release note:

- Fixes some JS functionality not working such as navbar search and scroll to top

[ghost]

DeepCode's analysis on #4fb641 found:

• :x: 0 critical issues. :warning: 0 warnings and 0 minor issues. :heavy_check_mark: 0 issues were fixed.

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