Right click to title of undocked sidebar closes sidebar. But view->sidebar is checked still. I don't know the true behavior of that right click but it seems a bug.
Steps to Reproduce:
1. Undock sidebar.
2. Right click to title of sidebar.
It closes sidebar
I don't know true behavior but current behaviour seems wrong. It seems better to me that nothing happens
User Profile Reset: No
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:50.0) Gecko/20100101 Firefox/50.0
Not reproduced. I tried all the different VCL backends.
Arch Linux 64-bit, KDE Plasma 5
Build ID: 2fd88ab1cbb4690a770ca2ca5d66157ec4906a2e
CPU Threads: 8; OS Version: Linux 4.8; UI Render: default; VCL: kde4;
Locale: fi-FI (fi_FI.UTF-8); Calc: group
Built on January 12th 2016
No repro on
Build ID: 3afe82bd63fde41d2a88418fb64e4ff587b05436
CPU Threads: 4; OS Version: Windows 6.19; UI Render: default;
TinderBox: Win-x86@42, Branch:master, Time: 2017-01-04_23:42:57
Locale: fi-FI (fi_FI); Calc: group
Build ID: 28f50d7e387864bd41a67b2fb78b9c98a708a00e
CPU Threads: 4; OS Version: Linux 4.8; UI Render: default; VCL: gtk2;
TinderBox: Linux-rpm_deb-x86_64@70-TDF-dbg, Branch:master, Time: 2017-01-11_01:19:53
Locale: en-US (en_US.UTF-8); Calc: group
CPU-Threads: 4; Betriebssystem:Linux 4.10; UI-Render: Standard; VCL: gtk2;
TinderBox: Linux-rpm_deb-x86_64@70-TDF, Branch:master, Time: 2017-09-11_23:29:06
Gebietsschema: de-DE (de_DE.UTF-8); Calc: group
Since reporting of this bug was more than a half year ago and the behavior couldn't reproduced, I will close this bug as WORKSFORME.
Feel free to reopen as UNCONFIRMED if it can be reproduced.