As an experienced user of Commons who prefers the Special:Search interface, I want a preference to keep that interface as the default target for the skin search input widget so that I can use my preferred interface when searching from the main search bar.
In T273879, we will be changing the skin search input widget to point to Special:MediaSearch. We want users to be able to revert the widget to point to Special:Search.
 A preference exists for users to keep the Special:Search interface as the default for the skin search input widget
 The preference appears under preferences in the Search tab after the "Redirect to existing matches when searching" preference
 The preference reads "[ ] Show search results in the Special:Search interface", and should //not //be selected by default
 Help text underneath the preference reads "Select to show search results from the main search bar in the older Special:Search interface instead of Special:MediaSearch"
 This preference should apply both to the vector and default skins
 Also change the text for the "Don't show the Advanced Search interface" preference to say "Don't show the Advanced Search interface when using Special:Search"