In brief: When we edit a page and search a string in whole the page, the search continue inside the edit window. In edits of modules, that not happens.
See this example.
Of course a return to an edit window with a separed search field will be benefit to all us.
Sorry: It happened at least for a few weeks, but I thought someone would post it.
I have also searched for a similar existing task but the word "editor" gives hundreds of results.