let the user expand/collapse all entries in sidebar Outline
Submitted by Adam Dingle
It would be great to have keyboard shortcuts that collapse/expand the entire document outline in the sidebar. Currently I can use the mouse or keyboard to collapse/expand a single row. (The mouse only expands a single row, and Shift+right arrow recursively expands everything beneath a row.) But sometimes I'd like to collapse the entire outline, since some documents open with it entirely expanded which can be awkward for navigation. I can imagine that expanding the entire outline might be useful in some situations too.
Version: git master