What I find most disappointing about most editors is the lack of dockable textareas to enter search and replace with regexps on single/multiple files. And the lack of a dockable panel with clickable links to jump to search results. Almost all of them use an infamous dialog box, or single-line text fields, or only jump to the next result: what a handicap.
Yet, manipulating text effectively is the most important operation. Incomprehensible.
EditPad does it and it's absolutely brilliant, but it's only usable on Windows. E