Summary: Ref T13090. The default width changed recently to become much wider, but the behavior on this control isn't great. Instead: - Pick a default width somewhere between the two. - Make the width sticky across show/hide (pressing "f" twice remembers your width instead of resetting it). - Make the width sticky across reloads (dragging the bar, then reloading the page keeps the bar in the same place). Test Plan: - Without settings, loaded page: got medium-width bar. - Dragged bar wide/narrow, toggled on/off with "f", got persistent width. - Dragged bar wide/narrow, reloaded page, got persistent width. - Dragged bar wide/narrow, toggled it off, reloaded page, toggled it on, got persistent width. Maniphest Tasks: T13090 Differential Revision: https://secure.phabricator.com/D19129