Optimize breadcrumb loading

[elatif2020]

Currently the breadcrumb is maybe slowest loading item, especially in the inbox.
We already made some fix to make it faster (by not loading all the items in the dropdown menu every time) and maybe it was reverted with the caching and could be brought back.
Also we should be able to optimize it using caching.

[elatif2020]

@andreymikhadyuk
Two comments here:

1. The first time after login, in inbox, when I switch to another item which is in the parent common of previous item, the breadcrumb doesn't update.
2. Let's remove the breadcrumb loader with the boxes animation, so just don't show anything until we have the text data. Alternatively we can show it only after 3 sec delay.

[andreymikhadyuk]

@elatif2020 Please specify 2 point concrete. If we do not need loader I will just remove it.

[elatif2020]

@andreymikhadyuk
let's remove

[andreymikhadyuk]

@andreymikhadyuk let's remove

I created PR where I removed loader. You can check.

[andreymikhadyuk]

@elatif2020 I could reproduce first point once, but cannot do it again to understand what's the issue. Can you reproduce it always and the steps are same as you mentioned in the comment?

[elatif2020]

now I couldn't reproduce it with the same item, but could with other items (similar to what I described)