1326975 - "Toggle sidebar" button in inspector doesn't always work if I doubleclick it twice

Status: NEW

(DevTools :: Inspector, defect, P4)

Description

[arni2033]

>>>   My Info:   Win7_64, Nightly 51, 32bit, ID 20160902030222 (2016-09-02)
STR_1:
1. Open devtools -> inspector, swith it to vertical mode (2 ways of doing that)
2. Doubleclick button to toggle sidebar

AR:  Sometimes sidebar toggles once. If I make huge pause between 2 clicks (Note 2), it toggles twice.
AR:  Either X or Y.  X is better.
 X) Every time I doubleclick the button, sidebar should toggle TWICE
 Y) Every time I doubleclick the button, sidebar should toggle ONCE


Notes:
1) There was no issue with old sidebar. There's also no issues with network monitor or debuger.
   They use toggle button to collapse/expand sidebars, and doubleclick ALWAYS toggles sidebar TWICE.
2) Let say sidebar transition is N ms. If I doubleclick with pause of N ms, sidebar toggles twice.
   Yes, it is doubleclick, not just 2 clicks. I checked that by adding attribute
   ondblclick="console.log('doubleclick')" to that button (using Browser toolbox).


This is regression from bug 1259819 (between 2016-07-16 and 2016-07-17). Regression range:
> https://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=2f9e69c982f1e67887a1834b36ff0af4ababb3af&tochange=3db372da6fe108ddb0727003447f22c2483fb86d