[Dark Shell][Core]: There is an extra white line between the title bar and menu bar when resize the window.

[julieyuan]

Steps:

1. Launch Brackets.
2. Double click the title bar to maximize the window.
3. Double click the title bar again to restore to orginial window size.
4. Move the cursor between title bar and menu bar.
5. Hover the mouse on the menus.

Results:
At step4, there will appear one white line between the title bar and menu bar.
At step5, when hover mouse on different menus, the white line will be overlapped by the menus. When click anywhere on the Brackets, the white line will disappear.

Expected:
Actually , I prefer to have this white line between the title bar and menu bar for it makes the UI much clear. But I think it will be good that this line is fixed(not flexible), or else it is not exist. The menus overlapping the white line is not good for user experience.

ENV: Win8.1 English OS
Build: 0.32.0-9586

Snapshots:
Please refer to snapshots for details:

[gruehle]

Medium priority to @JeffryBooher

FYI: I can't repro in my Windows 8 VM...

[peterflynn]

@gruehle I think you meant to say can't repro, right? It's UTR for me on my Win 7 machine too...

[julieyuan]

Checked it again. This issue not reproduces on my Win8.1 VM today. I will look into this issue and give feedback then.

[dalcala]

These steps are UTR for me, but I've encountered this symptom multiple times using BK 31 on Win 7 x64 English and I wasn't clicking the BK icon. It's pretty random though. I'm pretty sure I was just minimizing Brackets and then opening it again. The line I'm seeing looks a little different than Julie's.

[dalcala]

I can get this to repro every time now on Win7 with the following steps. I made a video here: http://screencast.com/t/NcpSOX3c.

1. Pin BK icon to Win 7 task bar
2. Delete BK user config folder (C:\Users[user]\AppData\Roaming) (not sure if this is necessary or not)
3. Open BK by clicking the BK pinned Task Bar icon, but leave the mouse hovering over the pinned task bar icon. Don't move the mouse!!
4. Wait until index.html renders (not sure if waiting for render is necessary or not)
5. Minimize BK by clicking the BK pinned Task Bar icon (again don't move the mouse - it should still be hovering over task bar icon).
6. Show BK by clicking the BK pinned Task Bar icon but leave the mouse hovering over the BK pinned task bar icon.
7. Slowly move the mouse up into the bottom area of BK.
   -> White line appears under title bar

[ram19890]

Open Brackets (ver:31 or ver:32)
Windows+D
Maximize Brackets
Right click the icon at the top left
YOU WILL SEE IT !!!
It shows the same classic windows , even if any file is open or not!

[peterflynn]

See #5321 for additional ways to reproduce this.

[peterflynn]

Nominating for Sprint 34

[ZhaoMuwei]

May I provide some additional info:
the almost exact problem occured to me when using Sprint 31 & 34.1, except that it happened when I Right Click on the title bar, not hovering or clicking on the app icon.

[njx]

See also #6221, which has an issue that looks like @LokerZhao's above. Should verify that the fix for this also fixes that.