**Feature summary** (what you would like to be able to do):
Add a Phabricator - Global Advanced Search as well as a Current Application context aware - Advanced Search to `phabricator-main-menu-search` to offer a less confusing context switch for Advanced Searching depending on the Current Application (Manifest, Diffusion, etc.
**Use case(s)** (describe the actual underlying problem which you want to solve, and not only a solution):
When clicking on Manifest - All tasks, the `phabricator-main-menu-search` offers context awareness of the "current application".
However, this does not translate into the current Advanced Search further down the menu under Other Options.
The current Advanced Search element under Other Options seems to always point to a context of "Global Advanced Search" with URL https://phabricator.wikimedia.org/search/query/advanced/
This Global Advanced Search could be an element always displayed.
And the application context aware Advanced Search given it's own placement just above.
See the following mock-up provided by me:
{F34596929}