SQL Developer version 126.96.36.199, Windows XP
Connections -> Packages -> expanding members of package / package body -> double click on package member does nothing (in previous version of SQL Dev it opened package / package body in editor and repositioned to double-clicked function / procedure)
Bugged as 17157410.
1. open pl/sql module in the editor.
2. Ctx menu -> Quick Outline...
3. Dockable panel with the same member structure (+filter) opens.
4. There drill down action (single mouse click) works.