Fix logger window blocking the bitmask quit().

- Set the logger window parent,
- don't use an mainwindow instance variable to hold the window object.

This fix have the side offect that prevent multiple log windows being
created at the same time, but it does not causes any side effect or
problem.

1 files changed, 1 insertions, 0 deletions

diff --git a/changes/bug_logger-hangs-quit b/changes/bug_logger-hangs-quit
new file mode 100644
index 00000000..b76f6218
--- /dev/null
+++ b/changes/bug_logger-hangs-quit
@@ -0,0 +1 @@
+- Fix logger window blocking the bitmask quit().