Fixes various issues with javascript services

[bjarnef]

Prerequisites

• I have added steps to test this contribution in the description below

Description

This fixes some issues after recent PRs has been merged, e.g. closeBackdrop in navigationService which wasn't a public function. However instead of exposing closeBackdrop in navigationService I think it makes more sense the call navigationService.hideMenu() which also close backdrop. In fact I think backdropServiceshould be responsible for logic regarding backdrops.

[umbrabot]

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[bjarnef]

@nul800sebastiaan this fixes part of the the issue, but it seems gulp doesn't compile all changes, e.g. the isArray(obj) changes in this PR.
Furthermore with latest changes in v8/contrib branch and these changes, the seach overlay looks strange.

Apparently the changes in regarding .umb-search-input.umb-search-input in PR #10735 affected the search input styling (not sure why) however changing back to ``.umb-search-input.umb-search-inputorinput.umb-search-input` seems to work.
Fixed in a62c990

[bjarnef]

Maybe it just took some time to compile the JS or something was cached (although I refreshed and cleared browser cache).
Anyway now I don't get the console error:

[nul800sebastiaan]

Aha! Now I understand what you meant with the array check! I amended it to also update the null check like you suggested yesterday - 0404670

[nul800sebastiaan]

Thanks for the quick assist @bjarnef, you're a star! ⭐