Blank window if RDP is used

**Describe the bug**
Blank window of Copyq is visible if copyq is started during a RDP session. It cannot be moved, resized or closed.

**To Reproduce**
Start Copyq after RDP to your machine. With Copyq main window a blank window is also visible and cannot be moved or closed. Even if main window is minimized, the blank window remains.

**Expected behavior**
Not to have this blank window

**Screenshots**

**Version, OS and Environment**

CopyQ 16.0.0
Arch: x86_64-little_endian-llp64
Audio: miniaudio 0.11.25
Compiler: MSVC
KNotifications: 6.23.0
KStatusNotifierItem: 6.23.0
OS: Windows 11 Version 25H2
QCA: 2.3.10
Qt: 6.10.2
QtKeychain: 0.15.0
has-audio: 1
has-encryption: 1
has-global-shortcuts: 1
has-keychain: 1
has-mouse-selection: 0

**Additional context**