Odd behaviors when renaming the master mixer channel.

[Sawuare]

Windows 10 Pro, 64-bit OS.

GUI bugs. They happen most of the time.

They are present in RC.4, but not in master.

• Bug 1:
  To reproduce:

1. On the master mixer channel, double-click it or right-click it then select "Rename channel".
   The green border of the naming box isn't there.
   
2. Click anywhere in the mixer other than the channel itself.
3. Do step 1 again then press enter.
   The name of the channel is highlighted in gray as if it was selected.
   

While bug 1 is present in a project then opening a new project, the bug will be present in it.

This bug can't be undone unless LMMS is closed.

• Bug 2:
  To reproduce:

1. Add a mixer channel if there isn't one.
2. Do step 1 in bug 1.
   The green border of the naming box isn't there, too.
3. Click any mixer channel other than the master one.
   

While bug 2 is present in a project then opening a new project, the name of the channel in the new project will be the same as the old project like this:

This bug can be undone by doing step 1 in bug 1, but this will result in bug 1.

[BaraMGB]

I cannot reproduce these bugs. I have the green border by renaming. ( Windows 10, 64 bit RC4)

What I can see is: While renaming I click outside of LMMS the mixer channel looks like your second pic:

[musikBear]

win 32 rc4 -no error eg -cant reproduce

[Sawuare]

I forgot to mention my specs and that these bugs happen most of the time, but not always.
Updated the original comment.

[PhysSong]

Confirmed step 3 of bug 1 on Ubuntu 18.04 beta. It can be fixed easily, by adding one line. I'll open a pull request for that soon.
Though I haven't tested other bugs on Windows, I can point out a possible reason for them. We use QLineEdit::editingFinished signal to detect the losing of focus of line edits. The signal should be emitted when a QLineEdit loses focus, but in the situation it seems not.

[PhysSong]

@Sawuare Could you provide some additional information about your system? I don't know if it can help, but I want to know:

• Language & Locale settings
• IME settings
  I hope someone can work around this(maybe Qt bug?).

[Sawuare]

@PhysSong

Input method is the same as the Keyboard layout, so US and Arabic (101).

[PhysSong]

Issue was wrongly closed by GitHub. As I guessed in #4293, it looks like a Qt bug or something similar. I'm sure there's nothing wrong in LMMS. I'll close this after switching to newer version of Qt and fix confirmed.