Wrong icon is displayed in tray

**Describe the bug**
CopyQ works perfect. Desktop icon shows in "dashboard" (if I right-click on CopyQ app in my Applications Menu > Add to dashboard), but when CopyQ is started, the icon displayed in the tray is a grayish image that doesn't have anything to do with CopyQ. I guess it has something to do with "Qt", whatever that is, because here's what I have in CopyQ logs: `Warning [2022-09-08 14:47:54.639] : [qt.qpa.xcb] QtWarning: QXcbConnection: XCB error: 3 (BadWindow), sequence: 8669, resource id: 21053800, major code: 40 (TranslateCoords), minor code: 0`. I added a CopyQ svg icon in my theme but that didn't change a thing. How could I have the right icon? It's not much, but enough to bother me and thus to not want to use it.
Thanks!

**To Reproduce**
Steps to reproduce the behavior:
1. Install CopyQ
2. Start CopyQ
3. See wrong icon in tray

**Expected behavior**
See same CopyQ icon as in dashboard

**Screenshots**

**Version, OS and Environment**
CopyQ Clipboard Manager 6.0.1
Qt: 5.15.2
KNotifications: 5.89.0
Compiler: GCC
Arch: x86_64-little_endian-lp64
OS: Ubuntu 22.04.1 LTS
Desktop environment: XFCE